For dogs seven years and older. Real chicken is the No. 1 ingredient. Antioxidant-rich nutrition helps maintain healthy organs and immune system. Optimal protein level helps older dogs maintain lean body mass for strong muscles and muscle mobility. Contains natural sources of glucosamine to help maintain healthy joints. Helps reduce the accumulation of plaque, tartar and dental stains for healthy teeth and gums. Purina One provides super premium nutrition for good health you can see in your dog. Veterinarians at Purina have identified six signs of optimal pet health, and Purina One is formulated to deliver all six. As the chart below shows, Purina One Senior Protection Formula is designed to promote your senior dog's body condition by helping maintain his muscle mass for strength and energy. If you have any questions, be sure to ask your veterinarian for assistance in assessing your dog's health. Six Signs of Optimal Pet Health/Purina One Nutritional Source: Body Conditions - Indicated by a lean body and strong muscles/Optimal protein level helps older dogs maintain lean body mass for strong muscles and muscle mobility. Fortified with vitamins and minerals to help support healthy organ function including a strong heart; Immune System - Indicated by overall well-being/Antioxidant-rich complete and balanced nutrition helps support a strong immune system. Balanced nutrition, including vitamins E, A and selenium, helps promote healthy aging; Bone and Joint Health - Indicated by bone strength and joint function/Contains natural sources of glucosamine to help support joint health and mobility. Enriched with vitamins and minerals, including calcium and phosphorus, to help support healthy joints and maintain strong bones; Digestion - Indicated by nutrient digestibility/High-quality ingredients, including real chicken and rice, provide high digestibility. Scientifically formulated for optimal nutrient absorption so more nutrients go to work inside your dog and less pass through as waste; Skin, Coat and Eyes - Indicated by condition of skin, coat and eyes/Complete nutrition with linoleic acid, an omega-6 fatty to make a visible difference in your dog's healthy skin and shiny coat. Vitamin A helps promote bright, healthy eyes; Dental Health - Indicated by condition of teeth/Crunchy kibble helps reduce the accumulation of tartar and plaque, whiten teeth and freshen breath. Contains no added fillers, artificial colors or flavors. Purina One Senior Protection Formula is specifically formulated for adult dogs. If you have a puppy, pregnant or nursing dog, feed growth and development formula dog food.