Purina Pro Plan Sport Performance 30/20 Beef and Bison Formula Dry Dog Food gives your dog the fine-tuned nutrition that he deserves. Perfect for high-performing dogs who need energy all day, the novel protein dog food provides concentrated nutrition to help optimize oxygen metabolism for increased endurance. High-quality beef is the first ingredient. A ratio of 30 percent protein and 20 percent fat helps maintain energy and fuel metabolic needs at all life stages. Live probiotics help aid digestive and immune health, and Omega-6 fatty acids and Vitamin A help nourish skin and coat. The antioxidant-rich, high energy dog food has amino acids to nourish and recover muscles, including in the critical time after exercise, while EPA and glucosamine help with joint health and mobility. It offers 100 percent complete and balanced nutrition and helps nourish and protect his immune system. The official sport dog food of Ducks Unlimited, the formula helps him achieve his full athletic potential.