Serve meals inspired by the science of nature when you pick up that familiar red bag of Purina ONE Natural Chicken and Rice Formula With Added Vitamins, Minerals and Nutrients adult dog food. What are the ingredients in Purina ONE? We choose our SmartBlend of Purina ONE dog food ingredients for a purpose. The high protein dog food features high-quality sources of protein for dogs, such as real chicken as the first ingredient, to help support strong muscles, including a healthy heart. With 100 percent nutrition and 0 percent fillers, this natural dog food has the added vitamins, minerals and nutrients adult dogs need. Plus, the adult dog food includes prebiotic fiber for gut health and immune support and vitamins A and E to support bright eyes. With added calcium, the crunchy dog food kibble helps support strong teeth, too. Check out the Purina ONE chicken dog food bag for the Purina ONE feeding chart, calories per serving, dog food ingredients list an