Purina One +Plus Dry Dog Food Skin and Coat Formula Satisfy your dog 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. Our salmon natural dog food recipe has no artificial colors flavors or preservatives. The Purina dog food formula also contains vitamin E and omega-6 fatty acids to promote your dog s skin and coat health. With 100% nutrition for adult dogs and 0% fillers every ingredient has a purpose.