Just like their human counterparts, dogs may develop food allergies. A food allergy is where the dog’s body recognizes food as a foreign invader and attacks it instead of processing the food.
Common symptoms of a food allergy include itchy and dry skin, nausea and vomiting, as well as gastrointestinal distress.
Some of the most common allergens for dogs are chicken, wheat, eggs, corn and soy. There are other foods that dogs may become allergic to, and tests from your veterinarian can help you identify exactly what your dog is reacting to.
Some people suspect, that since most of our dogs only eat one food their entire lives, they may build up a resistance to certain proteins in their food, or their gut may simply become inflamed and out-of-balance by only one thing, thus causing the intolerance.