Joint and bone development at a slow and steady pace is very important for large breed pups. This food is inclusive of nutrition that aids this including chondroitin, MSM and glucosamine. These help to maintain strong joints and supple cartilage. With 35 % of the food being made up of chicken, it is rich in protein that helps puppies grow strong. This recipe differs from regular Puppy Junior as it is less energy dense, ensuring the steady and measured growth that is so important for large breed pups.