Science Diet Puppy gives your puppy the right balance of essential nutrients to start your puppy off right. An ideal combination of tasty ingredients helps a puppy's body grow strong and healthy. It is enhanced with natural DHA, an Omega-3 fatty acid vital in the development of the brain and nervous system in puppies. Science Diet Puppy was developed to meet the higher energy needs of puppies up to 12 months, and pregnant and nursing dogs. Puppy is available in two kibble sizes (Original and Small Bites).