Canine Creek Ultra Premium Adult Dog Food is a life preservative and grain free formula. It is enhanced with 7 antioxidants , Blackberries, Cranberries, Pomegranate, Pumpkin, Spinach, Blueberries. Canine Creek food is also a manufacturing breakthrough because it is to minimize the heat the ingredients are exposed to. Minimizing heat exposure is important because high heat can degrade the potency of many vitamins, minerals, antioxidants and important enzymes.