OC Raw Dog Duck Liver AdditionsNaturally rich in protein, iron, and essential vitamins. Being a hypoallergenic protein, it is perfect for dogs with food allergies to common protein sources such as beef and chicken High in copper and zinc. Copper, an antioxidant, helps maintain a dog's coat and skin health. It is also vital in the absorption of iron and calcium Liver is high in phosphorus and purines; if your dog has kidney issues or uric acid stones, consult your vet before giving