Real chicken is our No. 1 ingredient. Real chicken contributes protein for strong muscles, including a healthy heart. Highly digestible rice for healthy energy. Natural sources of glucosamine help maintain healthy joints. Antioxidant rich nutrition for immune health. Targeted nutrition for adult dogs weighing over 50 pounds. Purina One Large Breed Adult Formula is formulated to help large breed dogs maintain a proper weight, which helps support healthy joints and strong bones. Purina One starts with real ingredients -- including chicken and rice -- for a healthy difference in your dog. His good health is reflected in the way he acts, looks and feels -- it's in his strong muscles, in his energy level, in his shiny coat and healthy skin. Six Signs of Optimal Pet Health: Strong Immune System: Promoted by antioxidant-rich nutrition, including Vitamins E and A and selenium. Body Condition with Strong Muscles and a Healthy Start: High-quality protein sources, including real chicken, help maintain lean muscle mass. Dental Health: Crunchy kibble helps reduce plaque build-up, whiten teeth and freshen breath. Healthy Skin, Shiny Coat & Bright Eyes: Promoted by Omega-6 fatty acids , including linoleic acid, and vitamins E and A. Digestive Health: Wholesome ingredients like the real chicken and rice contribute to high digestibility. Bone & Joint Health: Contains natural sources of glucosamine for joint health, and has 10% fewer calories than Purina One Lamb and Rice Formula to help support an ideal body condition. Contains no added fillers or artificial flavors. Animal feeding tests using Association of American Feed Control Officials (AAFCO) procedures substantiate that Purina One Large Breed Adult Formula provides complete and balanced nutrition for maintenance of large breed adult dogs.