Offer up a meal 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 dry dog food. With 100 percent nutrition and 0 percent fillers, this adult dog food is made with a SmartBlend of purposeful ingredients. What are the ingredients in Purina ONE? Real chicken is the number 1 ingredient of our high protein dog food, providing protein for dogs to help support strong muscles, including a healthy heart. Plus, the natural dog food has added vitamins, minerals and nutrients for dogs as well as prebiotic fiber for gut health and immune support. Vitamins A and E support his bright eyes, and natural sources of glucosamine for dogs promote joint health. With added calcium, the crunchy dog food kibble helps support strong teeth, too. Pick up that familiar red bag for the Purina ONE feeding chart, calories per serving, dog food ingredients list and instructions on changing dog food.