Cater to your dog's instinct for natural, protein-rich nutrition with Purina ONE True Instinct Classic Ground With Real Beef and Bison natural dog food with added vitamins, minerals and nutrients. This high protein grain free dog food starts with real beef as the number 1 ingredient and includes bison to help supply the meaty goodness your pal's been dreaming of. With 100 percent nutrition and 0 percent fillers, every ingredient in this nutrient-dense, high quality dog food has a purpose.