What is a food allergy?
A food allergy, as the name implies, is when your dog is allergic to a particular food or food additive in his diet. Protein sources, such as chicken and beef, are one of the most common allergens. Also seen somewhat frequently are allergies to certain grains such as rice.

Food allergies usually develop quite early in your dog’s life, generally before your dog is one-year old. However, they can develop in dogs of any age.

What will a food allergy look like in my dog?
Food allergy symptoms include vomiting, diarrhea, excessive gas, skin itchiness, poor coat quality, foul smelling skin, inflamed skin and/or ear infections. The gastrointestinal signs (vomiting,  excessive gas and diarrhea) are present in approximately 25% of food allergy cases. Food allergies, unlike many environmental allergies that may come and good with different seasons, will not wax and wane.