Purina One +Plus Dry Dog Food Skin and Coat Formula Give your dog a SmartBlend of ingredients at every meal with Purina ONE +Plus Natural Skin Coat Formula with added vitamins minerals and nutrients adult dry dog food. This high protein dog food features real salmon as the #1 ingredient and when combined with rice oatmeal and other high-quality ingredients delivers easy-to-digest nutrition for your dog. Developed to deliver 100% complete and balanced nutrition for adult dogs our salmon natural dog food recipe has no artificial colors flavors or preservatives and 0% fillers.