Dog Allergies: The Complete Guide — Part 4: Healing Naturally — Probiotics, Collagen, Omega-3 & the Full Repair Toolkit

Rachelle Gosnell
3 hours ago
31 min read

black and tan French Bulldog resting on sofa — Part 4 of the Dog Allergies Complete Guide by Hendricks and Maple, hendricksandmaple.com

A note from Rachelle

I’m not a vet, but this part is the practical one — the things you can actually do. Supplements with real research behind them. Things you can make in your kitchen. Changes that cost less than a repeat prescription and will actually move the needle. This is about healing the cause, not quieting the symptoms. Your dog is relying on you to figure this out. This part is to help you do that.

Nothing in this blog constitutes veterinary advice. Always consult your vet before changing your dog’s treatment plan — especially for parasite prevention such as flea and tick medications.

Haven’t read Part 1, Part 2 or Part 3 yet? Start there first — each part builds on the last.

This is the practical part. Everything in Parts 1–3 built to this: an evidence-based, actionable protocol for rebuilding the gut, repairing the skin barrier, and reducing the systemic inflammation that is driving your dog’s allergy. None of it requires a prescription. All of it has research behind it. Some of it can be made in your kitchen for almost nothing.

Boxer dog with natural ingredients for dog allergy treatment — Part 4 of the Dog Allergies Complete Guide by Hendricks and Maple, hendricksandmaple.com

Natural Remedies for Dog Allergies: The Complete Repair Toolkit

1. Probiotics — the foundation

Non-negotiable for any dog with allergies. A high-quality probiotic rebuilds the gut microbiome driving the immune overreaction. Not all probiotics are equal — these are the specific strains with published veterinary research behind them:

• Lactobacillus rhamnosus GG (LGG): A study published in the American Journal of Veterinary Research found that L. rhamnosus GG significantly decreased allergen-specific IgE (the antibody driving allergic response) in dogs and partially prevented atopic dermatitis in the first 6 months of life. The effects persisted for 3 years after discontinuing the probiotic — a remarkable finding for a supplement.¹³

• Bifidobacterium longum: A 12-week clinical trial in dogs with atopic dermatitis showed a significant decrease in CADESI-4 scores (the standard clinical measurement of skin condition in dogs) at weeks 4, 8, and 12 compared to placebo.¹³

• Lactobacillus acidophilus: Supports gut lining integrity and modulates immune response; included in multiple successful multi-strain trials in dogs.¹⁴

• Bifidobacterium bifidum, Bifidobacterium animalis, Bifidobacterium infantis: All used in the published randomised controlled trial (MDPI Animals, 2024) that showed significant improvement in allergy symptoms and gut microbiota composition in privately owned dogs.⁵

• Lacticaseibacillus paracasei (formerly Lactobacillus paracasei): Studied in a 2025 trial specifically for canine atopic dermatitis, showing improvement in both gut and skin microbiome markers.⁶

What to look for on the label: A product containing at minimum Lactobacillus rhamnosus, Bifidobacterium longum, and Lactobacillus acidophilus, with a CFU count of at least 10–50 billion per dose. Multi-strain formulas outperform single-strain products in the research.

How to give it: Dogs are lactose intolerant, so regular yoghurt is not suitable as a probiotic source on its own — and yoghurt alone rarely contains enough CFUs to make a clinical difference. The most practical approach: open a high-quality, shelf-stable probiotic capsule and sprinkle it directly over your dog’s food daily. If using yoghurt as a vehicle, choose plain, unsweetened, lactose-free yoghurt only.

Critical warning: check the ingredients label for xylitol — a common artificial sweetener in yoghurt that is highly toxic to dogs and potentially fatal even in small amounts. Plain Greek yoghurt (no additives) is also lower in lactose than standard yoghurt and generally well tolerated by most dogs.

Specific products to research — confirmed to contain the right strains:

Dog-specific, shelf-stable: - Dr. Dobias GutSense — contains L. rhamnosus and B. longum specifically; 10.1 billion CFU per dose. Formulated for dogs.

Search: Dr. Dobias GutSense probiotic - Dr. Carol’s Premium Dog Probiotics — 16 billion CFU, 10 strains including L. rhamnosus and B. longum.

Search: Dr. Carol’s dog probiotic - Makondo Pets Probiotics for Dogs — 9 strains, 5 billion CFU, includes L. rhamnosus and B. longum. Dosing guidance: up to 9kg = ½ scoop daily; 9–23kg = 1 scoop daily; over 23kg = 2–3 scoops daily

Human-grade probiotics (safe for dogs, widely available worldwide at pharmacies and health food stores): - Culturelle Daily Probiotic — contains Lactobacillus rhamnosus GG specifically — the exact strain used in the AVMA veterinary trial that showed IgE reduction lasting 3 years. 10–20 billion CFU per capsule depending on formulation. Shelf-stable, no refrigeration needed. Available in Australia, USA, UK, and most countries. Open capsule, sprinkle over food.

Search: Culturelle Daily Probiotic - Garden of Life Dr. Formulated Probiotics — contains L. rhamnosus alongside 31+ clinically studied strains. Shelf-stable versions available. Widely sold at health food stores and pharmacies globally.

Search: Garden of Life Dr. Formulated shelf stable probiotic - Now Foods Probiotic-10 — 25 billion CFU, 10 strains including L. rhamnosus and B. longum. Shelf-stable, affordable, and widely available internationally including Australia.

Search: Now Foods Probiotic-10 - Seed Daily Synbiotic — 24 clinically studied strains, shelf-stable with an 18-month shelf life, uses precision AFU (Active Fluorescent Units) measurement rather than standard CFU counting for more accurate dosing. Premium option, subscription-based. Search: Seed Daily Synbiotic

What CFU level to look for: A minimum of 10 billion CFU per dose is the therapeutic range supported by the research. Products under 5 billion CFU are unlikely to deliver meaningful clinical benefit for a dog with allergies. For a dog in active allergy distress, 10–20 billion CFU daily is a reasonable starting point — discuss with your vet for precise dosing by your dog’s weight and health status.

If your dog’s allergy is expressing as recurring UTIs:

Standard gut-health probiotics are a good starting point, but there is a more targeted option worth knowing about. Urinary tract-specific probiotic formulations combine strains that colonise the urogenital tract — particularly Lactobacillus rhamnosus and Lactobacillus crispatus — with cranberry extract (proanthocyanidins/PACs), which works by preventing E. coli from adhering to the bladder wall. A 2016 study published in the American Journal of Veterinary Research specifically confirmed the benefit of cranberry extract for dogs with UTIs through this anti-adhesion mechanism.³⁴

These are human urinary health probiotic formulations and they are appropriate for dogs. In Australia, Life-Space Urogen Probiotic for Women (available at Chemist Warehouse — contains 5 strains including L. rhamnosus plus cranberry extract) is the type of product used in this way. Similarly, Caruso’s Probiotic Urinary Health (also at Chemist Warehouse) combines PACRAN® cranberry extract with urinary-specific Lactobacillus strains.

Important: before using any human cranberry supplement for your dog, check the label carefully for xylitol — and for birch sugar, wood sugar, or birch bark sugar, which are the same compound with identical toxicity. Some formulations use xylitol as a sweetener and it is acutely toxic to dogs. Plain cranberry extract or formulations sweetened with natural fruit only. Open capsules over food; do not give tablets whole. Dose by body weight — consult your vet for guidance specific to your dog’s size and health.

2. Liquid Collagen — repair the skin barrier

A laboratory study reported that collagen peptide supplementation enhanced skin barrier function by approximately 22% in dogs.⁷ By rebuilding the skin barrier, collagen reduces how easily allergens penetrate and restart the itch cycle — treating the structural cause of ongoing skin reaction, not just the sensation. Liquid formulations have the highest bioavailability at 90–95% absorption, and effective dosing in research typically ranges from 2–10g of hydrolysed collagen daily depending on dog size (small dogs under 10kg / 22lb: 2–3g; medium 10–25kg / 22–55lb: 3–6g; large over 25kg / 55lb: up to 10g).

Not all collagen products are created equal — and the same problem that applies to kibble applies here. Just as high-heat extrusion destroys vitamins in dog food, high-heat processing during manufacture destroys the peptide integrity that makes collagen work. Many chews, treats, and capsules lose up to 80% of their collagen efficacy during high-heat processing. Here is what to look for before buying:

What makes a collagen product actually work: - Must be hydrolysed — look for “hydrolysed collagen peptides” on the label, not just “collagen.” Hydrolysis breaks the collagen into small molecules the gut can absorb. Without it, the molecules are too large to pass through the intestinal wall. - Molecular weight under 3,000 Daltons — the smaller the peptide, the better the absorption. Research confirms that peptides under 3,000 Da offer superior bioavailability, with measurable accumulation in skin within 1–3 hours of consumption and over 90% absorbed within 6 hours.²⁰ - Cold-processed or enzymatically hydrolysed — high heat destroys peptide bonds. Look for products that specify enzymatic or cold-process hydrolysis. - Liquid over capsules or chews — liquid formulations have the highest bioavailability (up to 90–95% absorption). - Third-party tested — look for a certification or third-party testing statement on the label.

Types of collagen to look for: - Type I — rebuilds the protective skin barrier that keeps allergens out - Type III — repairs damaged tissue and heals hot spots and scratched areas - Type II — supports joint health (often included in multi-collagen formulas)

Products to research — identified at the time of writing (June 2026):

At the time of researching and writing this post, the following products were available on the market and appeared, based on our research, to meet the quality requirements outlined above. We recommend using the criteria checklist to verify any product yourself before purchasing.

• CollagenVET by ThorneVet (independently third-party verified) — vet-formulated hydrolysed collagen powder; Thorne is one of the only pet supplement brands with rigorous independent third-party testing credentials. Note: this is a powder rather than liquid — if choosing powder over liquid, Thorne’s quality controls make it one of the few powders worth seriously considering. Search: ThorneVet CollagenVET

• Pure Majesty Pets Premium Collagen Drops — hydrolysed collagen peptides Type I & III at 462mg per serving; the 2026 formula combines Types I/III and undenatured Type II in a single liquid dose, targeting skin, coat, gut, and joint pathways. Search: Pure Majesty Pets collagen drops

• BACK 40 Liquid Collagen for Dogs — hydrolysed collagen combined with MSM, Biotin, and Vitamin C; described as human-grade and made in the USA. The addition of vitamin C is particularly relevant since vitamin C is required as a co-factor for collagen synthesis to occur in the body. Search: Back 40 Dogs liquid collagen

• Healthy Petz Premium Liquid Collagen — contains all three collagen types (I, II & III) in liquid form, plus MSM and Hyaluronic Acid to hydrate and repair damaged skin tissue. Search: Healthy Petz liquid collagen

Important: CollagenVET by ThorneVet is the only product in this list with confirmed independent third-party testing. The others appear to meet the quality criteria from published product information — but always verify with the manufacturer directly before buying.

3. Omega-3 Fatty Acids (EPA and DHA)

Omega-3s are anti-inflammatory by nature — they are precursors to prostaglandins that modulate the immune response. VCA Animal Hospitals note that fish oils are a common part of veterinary allergy treatment plans and may allow corticosteroid doses to be safely reduced over time.¹⁵ Most visible improvement in skin and coat appears after 4–8 weeks of consistent supplementation at therapeutic doses.

What to look for: - EPA and DHA content stated separately per serving — not just a total “omega-3” figure, which includes ALA (from plant sources) that the dog’s body cannot effectively convert to the active forms. - Triglyceride form (TG or rTG) — fish oil comes in two chemical forms: triglyceride and ethyl ester. The triglyceride form is how omega-3s occur naturally in fish, and research shows it absorbs significantly better. - Wild-caught, cold-water fish — anchovies, sardines, mackerel, and herring are ideal; lower on the food chain means less heavy metal accumulation. - Third-party tested for purity — fish oil oxidises and goes rancid. IFOS certification (International Fish Oil Standards) is the gold standard — it tests for mercury, PCBs, dioxins, and oxidation levels. - Liquid preferred over capsules — easier to dose by weight and you can check freshness.

Therapeutic dosing: A commonly cited starting point for dogs with allergies is 44–121mg of combined EPA + DHA per kg of body weight per day (approximately 20–55mg per pound). Discuss exact dosing with your vet based on your dog’s weight and health status.

Products identified in our research (June 2026): - Nordic Naturals Omega-3

Pet — IFOS certified; third-party tested for mercury (consistently undetectable). Triglyceride form for superior absorption. Liquid: 1,380mg omega-3 per teaspoon. Wild-caught. Available globally.²⁴

Search: Nordic Naturals Omega-3 Pet - Iceland Pure Pet Products Sardine & Anchovy Oil — single-ingredient, pharmaceutical-grade, cold-extracted from sardines and anchovies. Third-party purity tested.

Search: Iceland Pure Pet sardine anchovy oil - Pet Honesty Omega-3 Fish Oil — wild-caught Alaskan fish oil, third-party tested, NASC certified. Widely available in Australia, UK, USA, and globally.

Search: Pet Honesty omega-3 fish oil dogs - Whole food option — fresh sardines in spring water: check the tin says spring water only — no added salt, no sauces, no oil. Small dogs: 1 sardine; medium dogs: 2–3; large dogs: 4–5 sardines, two to three times per week. If you can only find them packed in oil rather than spring water, rinse before serving. This is the most natural, bioavailable, unprocessed omega-3 source available.

4. Quercetin — nature’s antihistamine

Quercetin is a plant flavonoid found in apples, blueberries, and leafy greens. It has been called “nature’s Benadryl” for its ability to stabilise mast cells and inhibit histamine release — directly addressing the itch mechanism without the side effects of pharmaceutical antihistamines.¹⁶

A study in Animals (2025) found quercetin helped reduce key inflammatory signals linked to chronic gut disease in canine intestinal tissue.¹⁷

What to look for: - Must be combined with bromelain — bromelain is a natural enzyme derived from pineapple that significantly enhances quercetin’s absorption and anti-inflammatory effect. A quercetin product without bromelain is considerably less effective. - Best taken on an empty stomach where possible; if it causes digestive upset, give with a small amount of food. - Dosage: 5–10mg of quercetin per kg of body weight (approximately 2.5–5mg per pound), twice daily. Always consult your vet to confirm dosing for your individual dog.

Products identified in our research (June 2026): - NOW Foods Pet Allergy Supplement — NASC certified; one of the few NASC-verified quercetin products in the pet supplement market.²⁵ Contains quercetin and bromelain.

Search: NOW Foods Pet Allergy quercetin dogs - Nutrition Strength Quercetin for Dogs with Bromelain — USA-made, contains both quercetin and bromelain combined in a chewable tablet.

Search: Nutrition Strength quercetin dogs bromelain - Human-grade quercetin + bromelain capsules — human quercetin with bromelain is safe for dogs at weight-adjusted doses. Many well-regarded supplement brands (NOW Foods, Thorne, Jarrow Formulas) make combined quercetin + bromelain capsules. Open a capsule, estimate the dose by body weight, and sprinkle over food.

Search: quercetin bromelain capsules.

5. Turmeric (Curcumin)

A 2021 study found that a turmeric and silymarin combination provided significant short-term itching relief in dogs with atopic dermatitis.¹⁸ Research in Veterinary Immunology and Immunopathology found curcumin reduced inflammation markers in dogs, in some cases acting on more pathways than prescription anti-inflammatory drugs.

What to look for — this one has three non-negotiable requirements: -

Piperine (black pepper extract) — piperine inhibits the liver enzymes that rapidly break down curcumin before it can be used, with research showing it can increase curcumin absorption by up to 2,000%. Look for BioPerine® (a patented, standardised black pepper extract with a minimum 95% piperine) on the label. - A fat source — curcumin is fat-soluble, meaning it requires dietary fat to be absorbed through the gut wall. - Standardised curcuminoid content — look for “standardised to 95% curcuminoids” on the label. Raw turmeric powder contains only 2–5% curcumin; a standardised extract delivers a reliable, consistent dose.

Products identified in our research (June 2026): - Zesty Paws Turmeric Curcumin Bites — one of the only dog-specific turmeric products that includes all three required components: 1,220mg turmeric, 380mg curcuminoids, BioPerine® (10mg at 95% piperine), and fully hydrogenated coconut oil as the fat co-factor. NASC Quality Seal.²⁶

Search: Zesty Paws Turmeric Curcumin Bites - Golden Paste (DIY whole-food option): combine ½ cup organic turmeric powder + 1 cup water + ⅓ cup coconut oil + 1½ teaspoons freshly ground black pepper. Simmer together for 7–10 minutes until a paste forms. Store in fridge for up to two weeks. Starting dose: ¼ teaspoon per 10kg (22lb) of body weight per day, gradually increasing.

Search: golden paste recipe for dogs. - Human-grade standardised curcumin with BioPerine: brands such as Thorne Meriva-SF, Jarrow Formulas Curcumin 95, and NOW Foods Curcumin are all well-regarded for quality. Give with a fat source — mix into food with a small amount of salmon oil or coconut oil.

Important: Always check with your vet before adding turmeric if your dog is on blood-thinning medications, as curcumin has mild anticoagulant properties.

6. Red Light Therapy / Photobiomodulation (PBM)

Red light therapy — more precisely called photobiomodulation (PBM) — uses specific wavelengths of light to trigger cellular repair processes in the body. Unlike laser or UV treatments, photobiomodulation uses wavelengths that are completely harmless to living tissue. They work by being absorbed by light-sensitive receptors in the mitochondria of cells (such as cytochrome c oxidase), which then upregulate energy production and activate cellular repair functions. It is non-invasive, drug-free, and has no known interactions with medications, supplements, or other treatments.

A meta-analysis found minimal adverse effects across clinical studies of red light therapy in dogs, and one study reported that 80% of dogs treated showed significant improvement in skin symptoms.¹⁹ Photobiomodulation is used by integrative and sports veterinarians for wound healing, post-surgical recovery, pain management, bone repair, gut healing, and inflammatory skin conditions — the same conditions driving chronic canine allergies.

Understanding the wavelengths — and why they matter for allergies:

Not all wavelengths do the same thing. Choosing the right wavelength means understanding what each wavelength penetrates and what it does:

• Blue light (415–490nm): absorbed primarily in superficial tissue — the skin surface. Has documented antibacterial and anti-inflammatory properties at the skin level. Effective for topical conditions: bacterial and yeast skin infections, allergic skin inflammation, surface wound healing. Because it is absorbed quickly by the outer skin layers, it does not penetrate that much to deeper tissue.

• Red light (630–670nm): penetrates deeper than blue, into the dermal layers. Used for skin healing, scar tissue repair, reduction of surface and dermal inflammation, and recovery from skin barrier damage.

• Near-infrared (NIR, 810–860nm): penetrates deeply through skin and muscle into bone, organs, and the gut. Used for deep tissue repair, bone healing, gut lining repair, brain support, and systemic anti-inflammatory effects.

For dogs with allergies — a condition involving both the skin and the gut — the ideal approach uses both blue and red/NIR wavelengths: blue for topical skin healing and bacterial/yeast management; red and near-infrared for deeper systemic anti-inflammatory support and gut lining repair.

Important device selection guidance:

• Choose pulsed over continuous wave. Pulsed devices — where the light cycles on and off at specific frequencies — are significantly more effective for therapeutic applications than continuous-wave devices. The pulsing pattern matters for cellular signalling, optimal absorption depth and biological uptake.

• Higher powered devices give faster treatment times — but require a cooling system. High-powered devices concentrate more energy in a shorter window, which is more efficient. The diodes and LED chips in high-powered units generate significant heat during operation — without a built-in cooling mechanism such as a heatsink, the device itself will overheat and the diodes will degrade or fail. A device with proper thermal management (typically a heatsink, which adds weight) maintains consistent power output and extends device life. This is why quality high-powered devices tend to be noticeably heavier than lower-powered panels, waiting for technology to improve with this one.

• Look for multi-wavelength panels that include at minimum red (630–670nm) and near-infrared (810–850nm). A device that also includes blue wavelengths (perhaps a seperate interchangeable panel) gives you the full spectrum for allergic skin conditions — topical antibacterial and skin-surface healing alongside deep gut and immune support.

Personal experience — Hendricks & Maple:

Photobiomodulation has been part of how we manage our dogs’ health for years. My husband Dr Martin Gosnell is a Senior Scientist and Research Engineer whose work spans bioinformatics, biophotonics, biomedical engineering, hyperspectral microscopy and image analysis, specialised optics, hardware and lasers. He uses and has worked with clinical-grade pulsed devices and developed the Regenr8 Pulse Unit, in Australia. When considering devices to purchase make sure you get pulsed, high power photobiomodulation device preferably with the ability to change panels from red panels to blue panels (or both wavelengths) as they do very different things and both are important for skin conditions.

We have used photobiomodulation on our dogs for C-section scars and neutering recovery (the speed of healing compared to untreated wounds is remarkable), dog fight injuries, and — directly relevant to this series — the skin reactions from wandering dew (Tradescantia) contact along with ozonated olive oil. Dogs who had scratched themselves raw until bleeding showed significant reduction in inflammation, redness, open wounds and itching within hours of treatment and was absolutely amazing. It has become a routine part of how we look after their and our health.

For allergies specifically, you would treat both the affected skin and the abdomen (gut area) — using blue wavelengths for topical skin healing and near-infrared for deep gut repair.

Safety: photobiomodulation is one of the safest therapeutic tools available — there are no known interactions with medications, supplements, or other treatments. Avoid shining any light directly into the eyes (use eye protection or keep the light away from the face). Otherwise it can be used freely alongside any medication or supplement programme.

Home devices for pet use:

A number of home photobiomodulation panels are now available. Look for: - Pulsed function (not continuous only) - Red (630–660nm) and near-infrared (810–850nm) wavelengths at minimum - Blue wavelength inclusion if available (especially useful for skin conditions) - Adequate power output for meaningful treatment times - A cooling mechanism for higher-powered models

Search: photobiomodulation device for pets, red light therapy panel dogs, pulsed red light therapy home device. In Australia, the Regenr8 Pulse is a well-designed clinical-grade pulsed device — search: https://www.regenr8.net.au/ however we not currently mass producing this unit at this time.

7. Multivitamins — replenishing what kibble destroys

Standard kibble is vitamin-depleted by high-heat processing — synthetic vitamins are sprayed back on after, but these absorb far less efficiently than naturally occurring equivalents. A quality supplement replenishes what the process destroys.

Key vitamins and minerals that matter for allergy and skin health:

- Vitamin A — essential for immune function, skin cell production, and maintaining healthy mucous membranes. Note: vitamin A toxicity is possible with excessive supplementation — do not overdose.

- Vitamin E — a powerful antioxidant that protects cell membranes from the oxidative stress caused by chronic inflammation. Research shows vitamin E is consistently depleted in dogs with ongoing allergic skin disease.

- B complex (B1, B2, B3, B5, B6, B12, folate, biotin) — almost entirely destroyed by the heat extrusion process used in standard kibble. B vitamins are essential for energy metabolism, skin integrity, nervous system function, and immune regulation.

- Zinc — direct correlation between zinc deficiency and impaired skin barrier healing in allergy-affected dogs. Zinc is involved in over 300 enzyme processes including immune response modulation.²²

- Vitamin D3 — dogs with chronic skin conditions often show lower circulating Vitamin D. Note: toxicity is possible with excessive supplementation — never exceed recommended dosing.

- Vitamin C — dogs synthesise their own but chronic inflammation can outpace production. Also required as a co-factor for collagen synthesis to work.

What to look for on the label: - Vet-formulated or developed under veterinary supervision - Natural-source vitamins where possible - NASC Quality Seal as a minimum standard - No artificial colours, flavours, or fillers

Products identified in our research: - Natural Dog Company Daily Multivitamin — NASC certified, made in the USA; 35 vitamins, minerals, and dietary nutrients including Vitamin A, D, E, B vitamins, zinc, organic turmeric, CoQ10, hemp seed oil, cod liver oil, and digestive enzymes.

Search: Natural Dog Company multivitamin - PetLab Co. Daily Multivitamin — NASC certified, manufactured in the USA, third-party testing claimed. Contains Vitamin A, E, B vitamins, folic acid, probiotics, and antioxidants. Available in Australia, UK, USA, and globally.

Search: PetLab Co. dog multivitamin - Zesty Paws 8-in-1 Multivitamin Bites — NASC Quality Seal holder; widely available worldwide. Contains Vitamins A, C, D3, E, B complex, zinc, biotin, cod liver oil, glucosamine, and a probiotic blend. Note: contains artificial flavouring — if you prefer a cleaner formulation, Natural Dog Company or PetLab Co. are the better choices.

Search: Zesty Paws 8-in-1 multivitamin bites

8. Topical Support — shampoos and conditioners that help rather than harm

While internal repair is the most important work, topical care plays a meaningful supporting role — particularly for dogs with environmental allergens, because regular bathing physically removes pollen, dust, and mould spores from the coat and skin before they trigger a reaction. Veterinary dermatologists increasingly recommend bathing allergy-prone dogs one to two times per week with an appropriate shampoo, not just when they are visibly dirty.

What to avoid in dog shampoos: Sulphates strip the natural oils from the skin. Isopropyl alcohol dries and sensitises the skin. Parabens and artificial fragrances are common allergen triggers in dogs that are already reactive.

What to look for: - Colloidal oatmeal — forms a protective barrier on the skin, locks in moisture, and calms inflammation - Ceramides — lipid molecules that repair the outer skin layer and reduce flare-ups - Aloe vera — cools and heals irritated, inflamed skin - Ophytrium — a natural extract specifically tested in peer-reviewed veterinary research for strengthening the skin barrier - Enzyme-based formulas — naturally target bacterial and yeast overgrowth - pH-balanced specifically for dogs — dog skin pH (6.2–7.4) is more neutral than human skin (4.5–5.5). Human shampoos, including ‘natural’ or ‘baby’ formulations, disrupt the dog’s acid mantle and accelerate skin barrier breakdown. Always choose a product that states ‘pH-balanced for dogs’

Specific products supported by evidence: - Douxo S3 CALM Shampoo — the most clinically evidenced dog shampoo for atopic dermatitis on the market. Contains Ophytrium. A 2025 clinical study published in the Journal of Small Animal Practice showed a 49.4% reduction in CADESI-04 scores within 21 days, with 61.8% of dogs achieving ≥50% improvement.²¹

Search: Douxo S3 Calm shampoo - Zymox Enzymatic Shampoo — contains the LP3 Enzyme System (lysozyme, lactoferrin, and lactoperoxidase), which targets surface bacteria, yeast, and fungi on the skin. No harsh detergents, no parabens.

Search: Zymox enzymatic shampoo - Burt’s Bees for Pets Oatmeal Shampoo — colloidal oat flour and aloe, pH-balanced, sulphate-free, paraben-free. Widely accessible and affordable. Search: Burt’s Bees oatmeal dog shampoo - Veterinary Formula Clinical Care Hypoallergenic Shampoo — fragrance-free, designed specifically for dogs and cats with sensitive skin and allergies.

Search: Veterinary Formula hypoallergenic dog shampoo

Between washes: The Douxo S3 CALM Mousse (the leave-on companion to the shampoo above) is the most clinically supported leave-on option. Search: Douxo S3 Calm mousse.

Once your dog's skin has cleared, moving to a gentle maintenance shampoo is appropriate. Earthbath make an Oatmeal & Aloe Shampoo that comes in a Fragrance Free version — one of the most widely recommended gentle maintenance shampoos by vets and groomers. Soap-free, pH-balanced, no parabens, no sulfates, no dyes, no fragrance. There are other candidates but for very allergic dogs it's best to avoid all added fragrances — most options we found that ticked the other boxes were still fragranced, so we didn't list them.

Search: Earthbath Oatmeal Aloe Fragrance Free dog shampoo.

Quick Wins — Simple Changes You Can Make Today

Before diving into supplements and recipes, here are the low-effort, high-impact changes that cost little or nothing and can make an immediate difference. Do these alongside the supplement protocol, not instead of it.

Replace plastic food and water bowls with stainless steel or ceramic. Plastic is a documented cause of chin, lip, and muzzle contact dermatitis. Do it today.

Rinse your dog’s paws — and belly — after every outdoor walk. A shallow container of lukewarm water at the front door takes thirty seconds. Paws carry pollen, grass proteins, and contact allergens that are licked and absorbed through the pads. The belly and inner thighs brush directly against grass and ground surfaces during every walk, making them a major contact allergen entry point too — particularly relevant for dogs reactive to grasses, wandering dew (Tradescantia), and ground-level pollens. For active paw reactivity, add a splash of diluted apple cider vinegar to the rinse water. For dogs who really resist paw rinsing, dog shoes worn during walks prevent the allergen making contact in the first place.

Wash all dog bedding weekly in fragrance-free, dye-free detergent. Dust mites concentrate in soft furnishings and bedding.

Vacuum regularly and consider a HEPA air filter in rooms where your dog spends most time. HEPA filtration captures dust mite allergen, pollen, and mould spores from the air.

Bathe your dog once or twice a week during active flare-ups. Regular bathing with an appropriate shampoo removes environmental allergens from the coat and skin surface. More frequent bathing with a gentle product is consistently better than less for an atopic dog.

If you find a hot spot — act immediately. A hot spot (acute moist dermatitis) is a patch of inflamed, broken, weeping skin that your dog has licked or chewed raw. It can appear overnight and spread quickly. Do not wait and see. The moment you find one: carefully clip the fur around the area to expose the skin and let it breathe (use blunt-tipped scissors or a pet clipper); clean it gently with diluted saline solution or diluted chlorhexidine — never hydrogen peroxide or full-strength antiseptic (both damage the tissue); allow it to air dry completely; apply a thin layer of coconut oil or calendula salve if available; and use an Elizabethan collar (cone) to prevent licking. If the area is large, spreading, or has a yellow discharge, see your vet promptly. The most important thing is to break the lick/scratch cycle as fast as possible.

Stop using air fresheners, scented candles, and synthetic fragrance plug-ins in your home. Dogs breathe near the floor where concentrations are highest.

The Kitchen Pharmacy — Quick Reference

Most of these use supermarket or health food store ingredients and cost a fraction of commercial alternatives. Listed by purpose so you can find what your dog needs.

homemade bone broth and natural kitchen remedies for dog allergies — Part 4 of the Dog Allergies Complete Guide by Hendricks and Maple, hendricksandmaple.com

Gut Health & Internal Support

Bone Broth (natural collagen, gut lining repair, joint support, leaky gut) - Bones (chicken feet, beef knuckle, oxtail, turkey necks) + water + 1–2 tbsp apple cider vinegar. Slow cook on low: chicken bones 12–24 hrs, beef/pork up to 48 hrs. Strain and cool. Sets like jelly in the fridge — that’s the gelatin. Skim fat before serving. Fridge 5 days or freeze in ice cube trays 3 months. No onion, no salt, no seasoning. Never give cooked bones — they splinter. - Dose: 2–3 tbsp / ¼ cup / ½ cup daily (small / medium / large) - Buy instead: verified hydrolysed liquid collagen supplement (see criteria above)

Goat’s Milk Kefir (whole-food probiotic, gut microbiome, digestive health) - Buy plain unsweetened goat’s milk kefir with live cultures — no added sugar, no xylitol (or birch sugar — same compound, same toxicity to dogs). Dairy-free: water kefir made with kefir grains. Introduce gradually over 1–2 weeks. - Dose: 1–2 tsp / 1–2 tbsp / ¼ cup daily (small / medium / large) - Buy instead: high-CFU dog probiotic with L. rhamnosus GG and B. longum

Cooked Egg (natural biotin, skin and coat health, vitamins A, D, E, B12) - Scrambled, boiled or poached — no butter, oil or seasoning. Always cooked: raw egg white blocks biotin absorption. - Dose: ½ egg / 1 egg / 1–2 eggs, 2–3 times per week (small / medium / large) - Buy instead: B-complex and biotin supplement

Spirulina Powder (natural B vitamins, zinc, IgE suppressor, anti-inflammatory) - Buy certified organic. Start at half dose for the first week. - Dose: ¼ tsp / ½ tsp / 1 tsp daily (small / medium / large) - Buy instead: quality dog multivitamin

Anti-Inflammatory & Immune Support

Golden Paste (anti-inflammatory, natural antihistamine, immune support — turmeric + black pepper + coconut oil) - ½ cup organic turmeric powder + 1 cup water + ⅓ cup coconut oil + 1½ tsp freshly ground black pepper. Stir turmeric and water over medium heat 7–10 minutes until thick paste. Remove, stir in oil and pepper. Refrigerate up to 2 weeks. The black pepper is essential — it makes turmeric bioavailable. Don’t skip it. - Dose: ¼ tsp / ½ tsp / 1 tsp daily, building slowly over 1–2 weeks (small / medium / large) - Buy instead: curcumin supplement with piperine (black pepper extract)

Coconut Oil — Internal (anti-inflammatory, antimicrobial, gut support) - Cold-pressed virgin coconut oil added to food. Introduce slowly — too much too quickly causes loose stools. - Dose: ¼ tsp / ½–1 tsp / 1–2 tsp daily (small / medium / large)

Topical Skin Relief

Oatmeal Bath (hot spots, itching, irritated skin, skin barrier) - Blend 1 cup plain rolled oats to fine powder. Dissolve in warm bath water. Stand dog in bath 5–10 mins, massage through coat. Rinse thoroughly. For targeted relief: mix oat powder with equal parts water to a paste, apply to affected area 5–10 mins, rinse. Plain unscented oats only. - Buy instead: colloidal oatmeal shampoo

Apple Cider Vinegar Rinse (skin pH balance, post-bath, mild itch relief, coat health) - 1 part raw unfiltered ACV (with “the mother”) + 1 part water. Apply after rinsing shampoo out, work down to skin. Leave in — no need to rinse. Do not apply to broken skin, open wounds or hot spots. - Buy instead: pH-balancing dog conditioner

Coconut Oil — Topical (antifungal, anti-inflammatory, hot spots, yeast, dry cracked skin) - Warm between palms, apply to affected areas — between toes, on hot spots, ear flap only (not inside ear canal). 1–2 times daily during flare-ups. Safe if licked in small amounts. - Buy instead: coconut oil-based dog skin balm

Natural Anti-Itch Cream (rapid itch relief, corticosteroid-like effect without steroids — Dr Andrew Jones DVM) - 1 tbsp cold-pressed coconut oil + 1 tbsp 100% pure aloe vera inner gel + 2ml liquorice root extract (approx 2 droppers). Mix and apply to hot spots, itchy patches, skin folds, between toes. 2–3 times daily during flare-ups. Refrigerate; use within 1 week. Important: use 100% pure inner gel aloe vera only — not whole-leaf or aloe juice, which can be toxic. Do not apply inside ear canal. Keep from eyes. - Buy instead: liquorice root extract + pure aloe vera inner gel (same recipe applies).

A note on garlic: The “garlic is toxic to dogs” warning applies to large amounts of raw garlic. Studies show the toxic threshold is far beyond any supplement dose.

Aged garlic extract (AGE) tested at 90mg/kg daily for 12 weeks in dogs showed zero adverse effects and significant immune and antioxidant benefits. A supplement listing aged garlic extract as a dosed active ingredient is not the same as feeding raw kitchen garlic. Check with your vet if your dog is on blood-thinning medication.

Quercetin from food: Blueberries (10–20 for small-medium dogs), apple slices (seeds and core removed), and lightly steamed broccoli florets (a few only, under 10% of daily diet) are all good natural quercetin sources. Frozen blueberries are preferable to fresh from the shops. A peer-reviewed study conducted using Australian blueberries found frozen blueberries retained up to 42% more anthocyanins — the powerful antioxidant pigments that give blueberries their colour — than fresh berries stored in the fridge for two weeks, which is what most supermarket blueberries are by the time they reach you.

A Note on Green-Lipped Mussel

Green-lipped mussel (Perna canaliculus, native to New Zealand) is worth a specific mention alongside omega-3 sources because it contains a unique omega-3 fatty acid — ETA (eicosatetraenoic acid) — not found in meaningful quantities in standard fish oil. Research shows ETA blocks inflammatory prostaglandin pathways in a way similar to NSAIDs, but without their documented side effects on gut permeability (discussed in Part 2). For dogs with chronic inflammatory skin conditions, it is a genuinely useful additional anti-inflammatory tool. It also provides glucosamine, chondroitin, and minerals naturally.

Important quality note: ETA is heat-sensitive — it is significantly degraded by the heat-drying process used in most standard dehydrated treat products. For therapeutic anti-inflammatory benefit, you need a freeze-dried or cold-processed powder supplement, not heat-dried treats. The product with the strongest published clinical research behind it for dogs is Sasha’s Blend — a freeze-dried Perna canaliculus powder that was the subject of a published randomised controlled trial in dogs (Hielm-Björkman et al., 2009) demonstrating measurable improvement in dogs with inflammatory conditions. Available through vet clinics and online across Australia. Search: Sasha’s Blend green lipped mussel dogs

Exception: do not use if your dog has a known shellfish allergy.

A Note on Hemp Seed Oil

Hemp seed oil (from Cannabis sativa, no THC) contains omega-3, omega-6, and omega-9 fatty acids in a naturally balanced 3:1 ratio, plus the full amino acid profile and gamma-linolenic acid (GLA) — an omega-6 with documented anti-inflammatory properties. It is not a direct substitute for the EPA/DHA found in fish oil (which the body can use immediately as anti-inflammatory agents), but it is a useful complementary addition to a skin and coat support protocol.

Mycavoodle, an Australian brand specifically formulated for doodle breeds, makes a hemp seed oil supplement targeted at itchy skin, mild anxiety, and coat health — available at mycavoodle.com.au. Human-grade cold-pressed hemp seed oil (ensure it is certified organic and from a reputable source) can also be added to food: start with ¼ teaspoon for small dogs, ½ teaspoon for medium dogs, and 1 teaspoon for large dogs, daily.

A Note on Sardines and Omega-3 Supplements

If your dog is already eating fresh sardines in spring water 3–4 times per week, they are getting a meaningful dose of EPA and DHA. You do not necessarily need to add a separate omega-3 supplement as well.

That said, during an active allergy flare-up, therapeutic omega-3 dosing is higher than most dogs will get from sardines alone — particularly larger dogs. In that phase, adding a quality omega-3 supplement alongside sardines gives you the concentrated anti-inflammatory dose needed to make a visible difference faster. Once the skin has cleared and you are in maintenance mode, sardines 3–4 times per week may be sufficient on their own.

Ozone Therapy — A Powerful Tool for Allergic Skin, Hot Spots and Ear Infections

Ozone therapy (medical O₃ — a molecule containing three oxygen atoms rather than the usual two) has been used in veterinary medicine for over a century and is experiencing a significant resurgence as holistic and integrative veterinary practice grows. It is particularly relevant for dogs with allergies, because the conditions that most frequently plague allergic dogs — hot spots, secondary bacterial and yeast infections, chronic ear infections — are precisely where ozone therapy has the most robust evidence.

Ozone works through oxidative action: the extra oxygen atom is highly reactive, killing bacteria, viruses, fungi, and yeast on contact while simultaneously stimulating tissue repair and reducing inflammation. It does not damage healthy tissue in the way many antimicrobial treatments do.

Applications relevant to allergic dogs:

- Hot spots and secondary bacterial skin infections — ozonated gels and oils applied topically kill surface bacteria and yeast while supporting skin barrier repair. Published research confirms ozonated olive oil is effective against common skin pathogens in dogs, including Staphylococcus pseudintermedius — the bacteria most commonly involved in pyoderma (bacterial skin infection) in allergic dogs.

- Chronic ear infections (otitis) — ozone therapy helps manage both bacterial and yeast-driven ear infections, which are among the most persistent secondary problems in atopic dogs. Ask a holistic or integrative vet about ear insufflation (gentle introduction of ozonated gas into the ear canal).

- Skin wound healing — including abrasions and hot spots that won’t resolve. Ozone accelerates tissue repair.

- Adjunctive support — ozone therapy potentiates other treatments and can be combined with conventional allergy management to improve outcomes.

Home use — ozonated gels and oils: Ozonated olive oil and ozonated coconut oil gels are available for home use and can be applied directly to affected skin. Rachelle personally uses an ozonated gel at home for her dogs and notes that these products must be refrigerated to maintain their ozone potency — ozone dissipates rapidly at room temperature and with exposure to light. Buy from reputable sources and follow storage instructions carefully.

For a veterinary-formulated topical option, Regeno3one Vet (regeno3onevet.com) — led by Dr Jyl Rubin DVM, who has been published in Veterinary Clinics of North America: Small Animal Practice — produces ozonated pet products including their Ozonated Insect Shield spray (ozonated organic olive oil combined with rosemary, peppermint, and cedarwood oils — DEET-free, chemical-free, effective against mosquitoes, flies, and fleas). Note: their topical products are NOT for use on cats. Ships internationally.

Professional ozone therapy: For more serious or persistent conditions — deep skin infections, chronic otitis, significant immune challenges — professional ozone therapy administered by a trained integrative vet is worth exploring. A growing number of veterinary practices across Australia now offer ozone therapy. Ask your vet, or search: veterinary ozone therapy Australia.

Make your own ozonated oils at home: It is also possible to make your own ozonated olive oil or coconut oil at home using an ozonator — a device that infuses ozone (an extra oxygen atom) directly into the liquid. We make our own at Hendricks & Maple. The process takes time but the result is a potent, cost-effective product. Store any ozonated oil in the fridge and in a dark container — ozone dissipates with heat, light, and time.

Search: home ozonator for ozonated olive oil.

When to Seek Urgent Veterinary Care

This post is about the long game — gut repair, barrier rebuilding, root cause resolution. But some symptoms require prompt veterinary attention regardless of which supplement protocol you are following. Do not delay seeing a vet if your dog shows any of the following:

• Open, weeping wounds or hot spots that are spreading rapidly or smell foul — these indicate secondary bacterial infection that may require antibiotic treatment

• Facial swelling, hives across the body, or sudden difficulty breathing — possible anaphylactic reaction requiring emergency care

• Hair loss spreading across large areas of the body

• Eyes swollen shut, or discharge from both eyes

• The dog is unable to sleep, eat, or drink due to constant scratching

• Blood in the stool alongside skin symptoms

The natural approaches in this post are complementary, not emergency medicine. Use your judgement — and when in doubt, call your vet.

Putting It Together

There is no single fix — but there is a systematic approach that addresses root causes rather than turning off the alarm:

1. Rule out fleas first — no protocol will work if an ongoing flea infestation is driving the reaction

2. Eliminate the most likely food allergen — strict elimination trial: novel single protein, single carbohydrate, no treats, no flavoured medications, 8–12 weeks minimum

3. Switch to lower-heat kibble — or add whole food additions if switching isn’t possible yet

4. Start a high-CFU probiotic daily — open a capsule over lactose-free yoghurt or food; minimum 10 billion CFU containing L. rhamnosus GG and B. longum

5. Add omega-3s — sardines, salmon oil, or algae oil daily

6. Add a verified hydrolysed liquid collagen — use the quality criteria above to choose one; 2–10g daily depending on size

7. Add a quality multivitamin — to replace what kibble processing has depleted, particularly B complex, zinc, vitamin E, and biotin

8. Consider quercetin and turmeric — natural anti-inflammatory and antihistamine support

9. Switch to an appropriate shampoo and leave-on conditioner — bathing 1–2 times per week removes environmental allergens from the coat; use topical barrier-repair products between washes

10. Explore red light therapy — particularly for dogs with localised hot spots, ear inflammation, or skin lesions

11. Give it time — gut repair is not instant. Allow 8–12 weeks before assessing

This is not an argument against veterinary care. It is an argument for asking your vet about the full picture — including diet, gut health, and natural anti-inflammatory support — before settling into a long-term prescription that manages the symptom without addressing what is driving it.

About the author — Rachelle Gosnell, Hendricks & Maple

I’m Rachelle Gosnell, the founder of Hendricks & Maple. Before H&M I spent around 20 years breeding, raising, and living with dogs and worked with my husband in research and development within biomedical fields — and it is that lived experience, as much as anything I’ve read, that informs this series. My four labradoodles — Hendricks, Maple, Olive, and Hazelnut — are my daily teachers and the reason this business exists.

What gives this series its particular lens is the household I live in. My husband, Dr Martin Gosnell, is a PhD scientist and engineer whose career spans bioinformatics, cell biology, hyperspectral imaging, and diagnostics. His work is used by medical research institutions, hospitals, and universities across Australia and internationally, and his hyperspectral imaging technology — which uses the colour of cells as a non-invasive diagnostic tool — won the 2016 ANSTO Eureka Prize, Australia’s most prestigious science award. Living and working alongside someone whose daily life involves understanding how biological systems function at a cellular level — how treatments work physiologically, how evidence is gathered and interpreted, how diagnostic tools are built and validated and to thoroughly research as well as my own individual lifelong research with my own health issues and finding alternative solutions to currently incurable health conditions for myself — changes the lens through which you look at health. It certainly changed how I look at my dogs health as well as ours.

I am not a vet, and nothing in this series is a substitute for professional veterinary advice. What I am is someone who has spent two decades watching dogs closely, who researches obsessively, has had a lifetime of trying to work out my own health issues and who has the great fortune of a genuinely rigorous scientific mind at the dinner table, and who cares deeply — perhaps more than is entirely reasonable — about the wellbeing of her labradoodles. We create content like this because we are dog people first. The business came second.

My hope for this 4 part series is that my deep dive information can help you if you and your four-legged friend are struggling with allergies and that this gives you the tools and know-how to do something about it understanding what is going on and what options there are that you can try to fix the root cause rather than just manage symptoms. Or at least the tools to discuss your dogs treatment more intensely at your next vet appointment with some knowledge of the options you can try together.

🍁 Hendricks & Maple ships worldwide from Mount Victoria, NSW, Australia. We also currently pop up monthly at the Blackheath Growers Market in the Blue Mountains — come and find us there.

long-haired chocolate dapple Dachshund sitting in a wildflower meadow — closing image for the Dog Allergies Complete Guide by Hendricks and Maple, hendricksandmaple.com

Hendricks & Maple is an online designer dog clothing and accessories brand born in the Blue Mountains of New South Wales, Australia — named after two of our four labradoodles, Hendricks and Maple, who inspire everything we do. We make and curate beautiful, practical accessories for dogs who deserve to look as good as they feel. We ship worldwide from Mount Victoria, NSW, and pop up monthly at the Blackheath Growers Market (second sunday of the month except January) for those who want to see, touch, and try things in person. Follow Us on instagram to see our in person events and pop-ups, new products and releases.

We create content like this because we are dog people first.

The business came second.

🍁 hendricksandmaple.com | 📸 @hendricksandmaple on Instagram

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Download the complete series as a PDF

Prefer to read offline or keep a copy? Download the full 4-part series as a single printable document — 35 pages with a table of contents, all references included.

Download: Dog Allergies — The Complete Guide (PDF) below link

Disclaimer: Hendricks & Maple does not sell any of the products or brands mentioned in this post and receives no financial benefit from any recommendation. This post is for educational purposes only and should never be followed over or in place of professional veterinary advice. Always consult your vet before making any changes to your dog's diet, supplements, or treatment plan. What works for one dog may not be appropriate for another.