Overview
Just like humans, dogs can be allergic to lots of substances, ranging from certain foods to pollen or dust. An allergy happens when your dog’s immune system responds inappropriately to a substance (the allergen) which dogs normally wouldn’t react to. These allergies can manifest in various ways, from skin irritations and digestive issues to more severe respiratory problems. But, remember, dog allergies can be complex and are often misunderstood.
Around 10% to 15% of dogs are believed to suffer from some form of allergy, although this figure may vary depending on age, breed, and location. Food allergies account for around 10% of allergies in dogs, flea bite allergies for about 40%, and atopic dermatitis (environmental allergies) for the remaining 50%.
Common symptoms of allergies in dogs
Which dogs are most likely to get allergies?
What are the most common allergens for dogs?
How are dog allergies diagnosed?
How are dog allergies treated?
Can allergies in dogs be prevented?
What’s a flea or insect allergy?
What is atopic dermatitis (atopy)?
What are food allergies?
What are contact allergies?
What are acute allergic reactions in dogs?
Have any studies into dog allergies been carried out?
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Medically reviewed by Lizzie Youens, BSc(Hons) BVSc MRCVS
Published on 18/09/2023 • Reviewed on 07/01/2026