Purina ONE High Protein Dry Senior Dog Food Plus Vibrant Maturity Adult 7 Plus Formula - 31.1 lb. BagPurina dog food for senior dogs with MCT rich vegetable oil to nourish and promote mental sharpness and shows an increased average activity level of over 20 percent in dogs seven and older Dry high protein dog food starts with real chicken as the number 1 ingredient and supports strong muscles, including a healthy heart Features omega 6 fatty acids, vitamins and minerals to support his shiny coat and healthy skin, plus natural sources of glucosamine