Complete Nutrition formula. Build: Digestive System. Replenish: Vital organs including a healthy heart. Bones & joints. Healthy Immune System. Repair: Muscle cells. 100% Complete & Balanced Nutrition that Builds, Replenishes & Repairs Every Day: Your adult dog may have grown out of his puppy behaviors, but his body is still changing. The fact is, from the moment he's born and throughout his lifetime, his body is building, replenishing and repairing itself 24 hours a day, 7 days a week. That's why we created the Purina Dog Chow build replenish repair philosophy - to provide your adult dog with the smart nutrition he needs to optimize this ongoing lifelong process, so he stays vigorously healthy throughout life. Build: Digestive System: Formulated with the high-quality protein and carbohydrate needed to support the constant turnover of intestinal cells, which helps re-build a healthy digestive system. Healthy Immune System: Replenishes building blocks of the immune system with a special combination of protein and antioxidant nutrients to help your day stay healthy. Replenish: Bones & Joints: Supplies optimal levels of calcium, phosphorus and protein to help maintain healthy bones, joints and teeth. Vital Organs Including a Healthy Heart: provides a complex spectrum of essential nutrients, such as protein, fat, vitamins and minerals, needed to replenish and support vital organs, including a healthy heart. Repair: Muscle Cells: provides the amino acids and minerals needed to support a dog's natural ability to repair and maintain healthy muscle cells. Purina Dog Chow Complete Nutrition Formula: Key Nutrients - That's what adult dogs require to maintain good health. The carefully selected, high-quality ingredients in Purina Dog Chow Complete Nutrition Formula give your dog these important nutrients and more in a great-tasting food that helps him build, replenish and repair his body every day throughout life. Animal feeding tests using Association of American Feed Control Officials (AAFCO) procedures substantiate that Purina Dog Chow provides complete and balanced nutrition for all life stages.