Purina Pro Plan Sport Performance 30/20 Formula Dry Dog Food - 37.5 Lb. Bag One (1) 37.5 lb. Bag - Purina Pro Plan SPORT Performance 30/20 Formula Dry Dog Food Features real chicken as the #1 ingredient Contains 30% protein and 20% fat to help fuel metabolic needs and maintain lean muscle Amino acids help nourish muscles, including during the crucial time immediately following exercise EPA and glucosamine help support joint health and mobility