Our male dog is allergic to wheat, corn, barley, beef and fleas. Just one bite sends him in to a scratching frenzy (like people allergic to mosquito's). Also, allergic to pine needles---no more "duty calls" near the pines. We feed him venison and potato dog food and it is fine ---unless someone, "kindheartedly" feeds him a piece of bread, or cookie. and then we're back to square one. Usually takes about a week to calm the scratching.