Royal Canin Large Breed Joint and Coat Dry Dog Food"Large dogs can have added strain on their bones and joints, which can slow them down. Royal Canin knows there is an exact science to your dogs joint healthand it starts with precise nutrition so they can maintain healthy movement. Royal Canin Large Joint Care dry dog food (formerly Maxi Joint Care) is tailored nutrition to support your adult dogs joint health. This bone and joint formula is designed with advanced nutrients like collagen to support