The Purina Pro Plan Joint Health Large Breed Dog Food is a high-quality, natural diet that is designed to promote joint health and mobility in your dog. This food is made with a beef-based formula that is rich in glucosamine and EPA, two nutrients that help support joint health. The food also contains natural prebiotic fiber, which nourishes the beneficial bacteria in your dog’s gut. The highly digestible large dog food is perfect for keeping your pet healthy and happy.