IAMS Mature Adult Large Breed Dry Dog Food is veterinarian recommended and made with premium real ingredients. Our recipe starts with lean farm-raised chicken and includes wholesome grains and veggies. It’s formulated to boost the immune system of older dogs with an antioxidant blend that includes vitamin E and beta-carotene. Plus, our crunchy, easily digestible kibble provides your senior dog with healthy skin and coat, strong muscles and bones, and reduced plaque. Look for the IAMS difference.