Hypoallergenic dog foods exclude common allergens like wheat, dairy, maize or soy and use ingredients that are easy to digest and less likely to cause intolerance or an allergic reaction. Popular options include Royal Canin hypoallergenic dog food and Purina hypoallergenic dog food. If your dog has developed itchy skin or a sensitive stomach, hypoallergenic food may help to relieve their symptoms. However, we recommend consulting with your vet first, so they can help you get to the root of the problem.