Hill's Science Diet Mature Adult has an essential balance of nutrients and calories, softer kibbles, and a controlled blend of vitamins and minerals to help your dog stay stronger, longer. The superior antioxidant blend also supports overall health by promoting strong, natural immunity. Science Diet Mature Adult is made with enriched with glucosamine and chondroitin to help support healthy joints and cartilage, while promoting healthy skin and a shiny coat. Ideal for senior dogs, 7+ years of age. Available in two kibble sizes - Original and Small Bites.