PureBites freeze-dried ocean whitefish treats are only made with one ingredient -- 100% pure Pacific Ocean wild-caught whitefish. Dogs love the taste of PureBites, which uses a delicate freeze-drying process to remove only the water of fresh, whole food, preserving all the characteristics and nutrition of fresh fish. These are high in protein and average only 5 calories per piece. They are easily broken into small pieces, which is why we use them so much for training. No corn, no soy, no grains.