The Merrick Grain Free Puppy Chicken Sweet Potato Recipe is a grain-free and gluten-free diet food that is formulated to meet the nutritional and developmental requirements of all puppies, including large and small breeds. This recipe features real de-boned chicken and sweet potatoes, which are cooked in the USA. The Merrick Grain Free Puppy Chicken Sweet Potato Recipe is also free of artificial colors, flavors, or preservatives.