Senior dogs need balanced nutrition. Eukanuba recognizes this and designed Eukanuba Senior Maintenance to provide high-quality, complete and balanced nutrition specially formulated with an excellent balance of appropriate protein, fat, vitamins, and minerals for the aging dog. Eukanuba Senior Maintenance Formula contains an optimal ratio of omega-6 and omega-3 fatty acids to help your medium-breed dog have healthy skin and a beautiful coat. It also contains natural sources of Glucosamine and Chondroitin Sulfate and as a whole promotes healthy joints. This food also contains our exclusive formulation of fiber with beet pulp and FOS (fructoogliosaccharides) to support a healthy digestive system for the senior dog. Eukanuba Senior Maintenance also contains antioxidants such as vitamin E and Beta-Carotene to help maintain their immune system.