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Dogs can be allergic to nearly any specific food ingredient. 1  However, there are certain meats and grains that are more likely to cause an allergic reaction in your dog. These include: 2  Pork. 3  Rabbit. 4  Beef. 5  Chicken. 6  Fish.
Common Food Allergens. The most common ingredients in dog food are also the most common allergens. The worst culprits are grains. Widely used filler ingredients such as corn, wheat and soy often trigger severe allergies in dogs.Common protein allergens are chicken, beef and fish.ommon Food Allergens. The most common ingredients in dog food are also the most common allergens. The worst culprits are grains. Widely used filler ingredients such as corn, wheat and soy often trigger severe allergies in dogs.