Help your dog excel with the fine-tuned nutrition of Purina Pro Plan Sport Performance 30/20 Beef and Bison Formula Dry Dog Food. Designed for highly active dogs and competitive canine athletes alike, this sport dog food provides concentrated nutrition to help optimize oxygen metabolism for increased endurance. Featuring real beef and bison, this dual-protein all stages dog food contains a ratio of 30 percent protein and 20 percent fat to help your active dog maintain energy and fuel metabolic needs at any age - whether you have a puppy, adult or reproducing female. Fortified with live probiotics for digestive and immune health, and Omega-6 fatty acids and Vitamin A to nourish your dog's skin and coat, this formula offers optimized nutrition that helps your dog thrive. And because Sport Performance 30/20 formulas are made specifically for hardworking dogs like yours, it features amino acids to nourish your dog's muscles including the crucial time immediately following exercise, while EPA and glucosamine also help support joint health and mobility. The antioxidant-rich formula offers 100 percent complete and balanced nutrition, while nourishing their immune system. And because it's the official sport dog food of Ducks Unlimited, you can feel confident in helping him achieve his full athletic potential each time you feed your champion Purina Pro Plan Sport Performance Beef and Bison 30/20 formula.