Iams ProActive Health Mature Dog Food nourishes your mature dog to promote the signs of healthy vitality. Fortified with essential minerals and specially formulated, this food helps maintain strong bones, healthy joints and a healthy metabolism to burn fat. The tailored fiber blend encourages a healthy digestion system. Made with high-quality protein, this Iams dog food, 15 lb, has no added gluten, giving you peace of mind that your canine friend will be well fed and satisfied.