Purina ONE large breed dog food helps support your big dog’s size and whole body health. With real protein as the first ingredient, these formulas help puppies build strong muscles and adult dogs maintain their ideal body condition. The balance of vitamins, minerals and other nutrients help support joint health to keep your large breed dog or puppy healthy and active. With Purina ONE large breed puppy food and adult dog food, you could see a healthy difference in your big dog. Explore our large dog food options below and try them today.