Royal Canin Size Health Nutrition Giant Adult Dry Dog Food Helps Support Giant Breed Dogs Healthy Bones And Joints Which Can Be Placed Under Stress By Body Weight. Contains An Exclusive Complex Of Antioxidants To Help Support Cellular Health. Combination Of Nutrients (Including Taurine) To Help Support A Healthy Heart. Helps Promote Good Digestibility With An Exclusive Formula Including Very High Quality Protein And A Balanced Supply Of Dietary Fiber.