Canine atopic dermatitis (also called atopy, atopic eczema, allergic dermatitis, canine atopic skin disease, or simply “chronic allergies”) is one of the most common—and most frustrating—skin conditions in dogs. You might also hear it referred to as “allergic skin disease,” “allergic dermatitis,” “ATP,” or “environmental allergies.” No matter the name, it’s a chronic, inflammatory disease caused by a combination of genetic, environmental, and immunological factors. While it can’t be cured, it can absolutely be managed with the right approach and ongoing teamwork between you and your vet.

What does atopic dermatitis look like?

Most dogs start with itching—scratching, chewing, licking, rubbing their face or paws. Over time, you might notice:

• Red, inflamed skin (especially on the belly, paws, ears, and armpits)
• Hair loss or thinning
• Recurrent ear infections
• Skin thickening or darkening
• Secondary infections (oozing, crusting, “smelly” patches)

What causes it?

It’s rarely just “one thing.” Atopic dermatitis is driven by:

• Genetics: Some breeds (like Staffies, Westies, and retrievers) are more prone.
• Environmental allergens: Dust mites, moulds, pollens, and household plants are common triggers. Even grasses, weeds, and human dander can set things off.
• Skin barrier defects: Many atopic dogs have a weaker skin barrier, making it easier for allergens and microbes to get in.
• Immune system overreaction: The immune system mistakes harmless substances for threats, triggering inflammation and itch.

How is it diagnosed?

There’s no single test—diagnosis is stepwise:e

• History & exam: We look for classic signs and patterns.
• Rule out other causes: Flea allergy, mange, food allergy, and infections need to be excluded first.
• Therapeutic trials: Sometimes we try treatments (like strict flea control or a prescription diet) to see how your dog responds.
• Allergy testing: Not always needed, but can help if we’re considering immunotherapy.
• Referral: Severe or unusual cases may be referred to a specialist dermatologist.

Why is the skin barrier important?

Think of the skin as a wall. In atopic dogs, the bricks are loose and the mortar is crumbly. Allergens, bacteria, and yeasts slip through, making the immune system go into overdrive. Supporting the skin barrier (with nutrition and topical care) is a cornerstone of management.

Treatment: What are your options?

Managing atopic dermatitis is about reducing itch, calming inflammation, and preventing infections. Most dogs need a combination of strategies:

1. Environmental management

Minimise exposure to known allergens (regular cleaning, washing bedding, air filters).

Bathing with gentle, medicated shampoos to remove allergens and soothe skin.

2. Immunological intervention

Glucocorticoids (e.g., prednisolone): Fast, effective, and affordable for short-term flare control. Long-term use can cause side effects (thirst, hunger, weight gain, liver changes, increased risk of infection), so we aim for the lowest effective dose or use them only as a “rescue” option.

Apoquel (oclacitinib): Targets the JAK-1 pathway, blocking itch and inflammation at the source. Works quickly (often within 4 hours), doesn’t cause the thirst/hunger issues of steroids, and is safe for long-term use in most dogs. Some may experience mild digestive upset or, rarely, increased susceptibility to infections. [Apoquel PI, Zoetis; VIN, 2024]

Cytopoint (lokivetmab): A monoclonal antibody injection that neutralises interleukin-31, a key itch signal. Can provide 4–8 weeks of relief per injection. It’s not a drug—so it’s very safe, even for older dogs or those with other health issues. Some dogs respond better than others, and it may be less effective for severe inflammation or infections. [Cytopoint PI, Zoetis; VIN, 2024]

Finding the right fit: Every dog is different—some do best on Apoquel, others on Cytopoint, and some need a combination or occasional steroids. The goal is to find what works for your dog, with the fewest side effects.

3. Managing secondary infections

Atopic skin is prone to bacterial (Staph) and yeast (Malassezia) infections. These often need specific treatment (antibiotics, antifungals, medicated washes) alongside allergy management.

4. Nutrition & prescription diets

What your dog eats can make a real difference. Specially formulated diets support the skin barrier, reduce inflammation, and help avoid dietary allergens.

Hill’s Derm Complete: Contains bioactives and phytonutrients (from eggs, citrus, broccoli, and kale) that interrupt the itch cycle, plus high levels of omega-3 and -6 fatty acids to reduce inflammation. It’s designed for both food and environmental allergies, supporting the skin barrier and microbiome. [Hill’s Derm Complete product page]

Hill’s z/d: Uses hydrolysed proteins—broken down so small the immune system can’t recognise them—making it ideal for dogs with true food allergies. [Hill’s z/d product page]

Royal Canin Skin Support: Features a patented “skin barrier complex” (including niacinamide, pantothenic acid, and histidine), omega fatty acids, and antioxidants to reinforce the skin and limit inflammation. [Royal Canin Skin Support product page]

Royal Canin Anallergenic: Uses extensively hydrolysed feather protein (the smallest possible protein fragments) and is manufactured to avoid cross-contamination. It’s for dogs with severe or multiple food allergies. [Royal Canin Anallergenic product page]

These diets are more than just “hypoallergenic”—they actively help repair the skin, reduce inflammation, and can make medical management much easier. They’re backed by solid research and are often a key part of long-term success.

What to expect:

Managing atopic dermatitis is a marathon, not a sprint. There will be ups and downs, and even with the best plan, flare-ups can happen—especially if prevention lapses. The aim at PMV is to give you the knowledge and tools to minimise vet visits and costs, so you can manage most flare-ups at home. Consistency is everything.

If you ever feel stuck or overwhelmed, reach out—no question is too small. Together, we can keep your dog as comfortable and happy as possible.

References

• Olivry, T., DeBoer, D.J., Favrot, C., Jackson, H.A., Mueller, R.S., Nuttall, T. & Prelaud, P. (2015). Treatment of canine atopic dermatitis: 2015 updated guidelines from the International Committee on Allergic Diseases of Animals (ICADA). BMC Veterinary Research, 11, 210. https://doi.org/10.1186/s12917-015-0514-6
• Miller, W.H., Griffin, C.E. & Campbell, K.L. (2013). Muller & Kirk’s Small Animal Dermatology. 7th ed. St. Louis: Saunders Elsevier.
• MSD Veterinary Manual. (2024). Atopic Dermatitis in Dogs. Available at: https://www.msdvetmanual.com/dermatologic-disorders/allergic-skin-diseases/atopic-dermatitis-in-dogs [Accessed 5 Feb. 2026].
• PetMD. (2024). Atopic Dermatitis in Dogs: Symptoms, Causes, and Treatments. Available at: https://www.petmd.com/dog/conditions/skin/c_dg_atopic_dermatitis [Accessed 5 Feb. 2026].
• VIN (Veterinary Information Network). (2024). Clinical Reference: Atopic Dermatitis in Dogs. Available at: https://www.vin.com/apputil/content/defaultadv1.aspx?id=3862840 [Accessed 5 Feb. 2026].
• Zoetis Australia. (2024). Apoquel® (oclacitinib) Product Information. Available at: https://www.zoetis.com.au/apoquel [Accessed 5 Feb. 2026].
• Zoetis Australia. (2024). Cytopoint® (lokivetmab) Product Information. Available at: https://www.zoetis.com.au/cytopoint [Accessed 5 Feb. 2026].
• Hill’s Pet Nutrition. (2024). Derm Complete Dog Food Product Information. Available at: https://www.hillspet.com.au/dog-food/derm-complete-dry-dog-food [Accessed 5 Feb. 2026].
• Hill’s Pet Nutrition. (2024). Prescription Diet z/d Canine Product Information. Available at: https://www.hillspet.com.au/dog-food/zd-canine-ul [Accessed 5 Feb. 2026].
• Royal Canin Australia. (2024). Skin Support Dry Dog Food Product Information. Available at: https://www.royalcanin.com/au/dogs/products/vet-products/skin-support-dry [Accessed 5 Feb. 2026].
• Royal Canin Australia. (2024). Anallergenic Dry Dog Food Product Information. Available at: https://www.royalcanin.com/au/dogs/products/vet-products/anallergenic-dry [Accessed 5 Feb. 2026].
• PetSure Australia. (2024). Atopic Dermatitis in Dogs: Claims Data and Management. Available at: https://www.petsure.com.au/vet-resources/atopic-dermatitis-in-dogs [Accessed 5 Feb. 2026].
• Veterinary Partner. (2024). Canine Atopic Dermatitis. Available at: https://veterinarypartner.vin.com/default.aspx?pid=19239&id=4952736 [Accessed 5 Feb. 2026].