Help keep your guy going strong with Purina Pro Plan Veterinary Diets JM Joint Mobility Canine Formula Dry Dog Food. This great-tasting dry food is specially formulated to help support joint and cartilage health in dogs. It is crafted in collaboration with nutritionists, researchers and veterinarians to contain long-chain omega-3 fatty acids, glucosamine, antioxidants and vitamin E. This dry dog food is paw-fect for all breeds of dogs in any stage of life and features a high protein-to-calorie ratio to help promote lean muscle mass for your mate.