Fuel your dog's lean muscles and more for his active life with Purina ONE True Instinct Lean Muscle Support With Real Beef Natural With Added Vitamins, Minerals and Nutrients Dry Dog Food. This nutrient-dense beef dog food delivers 32 percent protein in every serving (the highest protein levels offered within the Purina ONE portfolio). Featuring real beef as the number one ingredient and high protein to promote lean, strong muscles, this dog kibble is a first-of-its-kind to the True Instinct line, providing multiple benefits that deliver on the unique, targeted needs of dogs. This natural dog food includes added vitamins and minerals with no poultry by-product meal and no artificial flavors or preservatives; only what your dog needs to help keep him lean and at an ideal weight. Give your dog a high protein dog food that provides 2x the tender meaty morsels when you fill their bowl with this Purina One True Instinct Dog Food.