Large- and giant-breed puppies grow so quickly, but controlling that growth is critical for their proper development to adulthood. Eukanuba recognizes this and offers Eukanuba Large Breed Puppy, specially formulated to nutritionally support balanced muscular and skeletal development of large- and giant-breed puppies. Eukanuba Large Breed Puppy contains precisely balanced levels of calcium, phosphorus, protein and fat to help promote healthy bone growth. It also contains natural sources of Glucosamine and Chondroitin Sulfate and as a whole supports healthy joints that can be stressed by a large-breed puppy's growth and weight. Eukanuba Large Breed Puppy is also made with natural fish oil to deliver enhanced levels of DHA (docosahexaenoic acid) for optimal brain development and a smart, trainable puppy. FOS, a natural Prebiotic, is included to support your puppy's strong defenses from within the digestive tract. Eukanuba Large Breed Puppy also has appropriate levels of fiber to help aid digestion and help your puppy have appropriate stool volume for easier cleanup.