Purina Pro Plan Dry Dog Food, Sport, Advanced 28/18 Formula, 18-Pound Bag, Pack Of 1 One (1) 18-Pound Bag Of Purina Pro Plan Advanced 28/18 Formula High-Quality Protein To Promote Total Body Health, Including Chicken As The First Ingredient Amino Acids Help Nourish Muscles Including The Crucial Time Immediately Following Exercise 28% Protein And 18% Fat Helps Fuel Metabolic Needs And Maintain Lean Muscle Epa, An Omega-3 Fatty Acid, And Glucosamine Help Support Joint Health And Mobility