Large dogs are treasured for their incredible working abilities, and prove to be wonderful herding, tracking, rescue, guard and assistance dogs. These powerful and devoted dogs can often suffer from digestive sensitivities, joint pain and even cardiac issues. Royal Canin Large dry dog food formulas address the needs of the large dog throughout its lifetime-from the large dog's longer growth period, to nutrients to help limit inflammation of the joints and highly digestible proteins to ease digestion. Large Puppy is for large breed puppies up to 15 months.