Glucosamine Chondroitin MSM Antioxidants For Dogs of All Sizes 6 Beneficial Ingredients Including All the Health Benefits of the Perna Mussel No Wheat No Corn No Artificial Ingredients For Use In Dogs Only Quality Seal - NASC Why It Works Hip + Joint Pro has more active ingredients including Glucosamine, Chondroitin Sulfate, MSM, Perna, Vitamin C and Manganese to maintain joint lubrication and support flexibility and mobility-all packed in a chew your dog will love.