It takes superior nutrition to meet the needs of a large breed dog, and Hill's® Science Diet® Puppy Large Breed pet food has it. For puppies who will weigh more than 55 lb. (25 kg.) when fully mature, Hill's® Science Diet® Puppy Large Breed pet food promotes healthy muscle and bone development as well as properly controlled growth so large breed puppies grow healthy and sound. It also includes a superior antioxidant blend for a lifetime of good health plus carnitine, a special nutrient shown to enhance bone strength and structure. It is enhanced with natural DHA, an Omega-3 fatty acid vital in the development of the brain and nervous system in puppies.