Large-breed dogs can be prone to joint issues, which is why Hill's Science Diet Healthy Mobility Large Breed dry dog food contains advanced nutrition shown to support healthy joints and improve mobility in 30 days. Using natural sources of glucosamine and chondroitin â€“ the building blocks of healthy cartilage â€“ this adult dog food supports the joints, while a balanced set of minerals promote strong bones. High-quality protein and natural fibers keep your large dog satisfied between meals, and to help your canine keep a shiny coat, this dog food made with natural ingredients contains omega-6 fatty acids and vitamin E to nourish the skin. Thereâ€™s more to love with the new look of Science Diet. Some of our products also have new names, new kibble shapes & new formulas.