The Best Food Options for Your Dog with Allergies : Your Pet Doctor

By Your Pet Doctor

In order to identify what is the best food for dogs with food allergies you must first understand what are food allergies and what causes them.

Many different terms are used to describe abnormal reactions to food. The terms “allergy” and “hypersensitivity” describe an immunologic reaction to food allergens and requires previous exposure to the allergen to bring about symptoms. In contrast, a food “intolerance” does not involve the immune system and can occur with the first exposure to a certain food. Both reactions produce similar symptoms and may be difficult to tell apart without veterinary guidance.

In fact, according to Dr. Adam Patterson, clinical assistant professor and Chief of Dermatology at the Texas A&M College of Veterinary Medicine & Biomedical Sciences Small Animal Clinic, “Food allergies in dogs present themselves quite differently than food allergies in humans. For instance, a person who is allergic to shellfish may experience throat swelling and possibly a critical or fatal reaction, but in dogs, the allergy is expressed through the skin and seen most often as itch.”

Symptoms of food allergies in dogs vary, but the most common complaint is non-seasonal itching that may involve the whole body or be focused on the ears and feet. Chronic or recurrent ear and skin infections are also typical. Some dogs may even develop vomiting, diarrhea, or excessive gassiness. Symptoms often begin when dogs are young (before one year of age), but may develop at any time.

Dogs with food allergies are typically allergic to proteins, which come from animal or plant-based ingredients of the diet. The proteins are broken down into molecules that the immune system misidentifies as a potential threat. Beef, dairy, wheat, and chicken are the most common culprits of food allergies in dogs. The development of food allergies, however, takes time. So the dog may have been eating the offending ingredients for quite a long time before symptoms develop.

A food trial using a “hypoallergenic” dog food is the only reliable way to diagnose food allergies in dogs. There are two ways to do this – using a novel protein source or hydrolyzed protein.

A “novel” protein source is one that is completely new to the dog, thereby reducing the chance of an immune response. In addition, the diet should contain a novel, single source of carbohydrates since plants also contain protein. Hypoallergenic dog food options include venison and potato, duck and pea, salmon and potato or even kangaroo, as long as the dog hasn’t been exposed to these ingredients in the past. Lamb used to be considered hypoallergenic but is now in so many commercial dog foods that it is no longer novel.