A significant number of dogs in the UK suffer from allergies, which can cause considerable discomfort and distress. Dog allergies can manifest in many different ways and can be triggered by a wide variety of substances. Understanding the different types of allergies, recognising the symptoms, and knowing the treatment options available is crucial for helping your dog live a comfortable, healthy life. This comprehensive guide covers everything you need to know about dog allergies.
Environmental allergies, also known as atopic dermatitis or atopy, are triggered by substances in your dog’s environment. Common environmental allergens include pollen (from trees, grasses, and weeds), dust mites, mould spores, and certain cleaning products. Dogs with environmental allergies typically show seasonal symptoms or symptoms that persist year-round depending on the allergen involved.
Food allergies in dogs are triggered by specific protein or carbohydrate components in their diet. Common culprits include beef, dairy, wheat, chicken, eggs, lamb, soy, and corn, although any food ingredient can potentially cause an allergic reaction. Food allergies can develop at any age, even to foods a dog has eaten for years without problems. They typically cause non-seasonal symptoms.
Flea allergy dermatitis is triggered by an allergic reaction to flea saliva. Even a single flea bite can cause intense itching in a dog with FAD. The typical distribution of itching and skin changes is over the rump, tail base, and inner thighs. Rigorous flea control on the dog and in the environment is essential for managing FAD.
Contact allergies result from direct skin contact with certain substances, such as specific plants, cleaning products, carpets, or fabrics. They are less common than the other types and typically cause localised skin reactions.
Common signs of allergies in dogs include:
Diagnosing the specific cause of an allergy can be complex. Your vet will typically take a detailed history, perform a skin examination, and may recommend further tests including skin cytology, blood allergy tests (serology), skin intradermal tests, or a strict dietary elimination trial (for suspected food allergy). Eliminating other causes of itching, such as parasites and infections, is an important first step.
Treatment depends on the type and severity of the allergy and may include allergen avoidance, prescription medication (antihistamines, corticosteroids, Apoquel, or Cytopoint injections), regular bathing with medicated shampoos, allergen-specific immunotherapy (allergy shots or sublingual drops), and rigorous parasite control. A combination of approaches is often most effective for long-term management. Working with a veterinary dermatologist is advisable for complex or poorly controlled cases.