Hill's Science Diet Healthy Mobility Small Bites dry dog food contains advanced nutrition shown to support healthy joints and improve mobility in 30 days. Using natural sources of glucosamine and chondroitin - the building blocks of healthy cartilage - this small kibble supports the joints, while a balanced set of minerals promote strong bones. High-quality protein and natural fibers keep your tiny 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.