Hip & Joint liver flavor chewables provide levels of the key actives glucosamine, chondroitin and MSM to help maintain healthy canine joint function and connective tissue. Glucosamine is of benefit in maintaining joint health and supporting mobility and activity in dogs of all ages and sizes. Chondroitin sulfate protects existing cartilage and slows its break down. Methysulfonylmethane (MSM) is a natural anti-inflammatory agent that provides sulfur essential in the formation of cartilage.