Eukanuba Senior Maintenance Formula is a nutritional breakthrough for senior dogs. It provides an optimal balance of appropriate protein, fat, calories, vitamins, and minerals for the aging dogs. As dogs age, they typically need fewer calories from fat, but protein is critical to their diet to ensure the proper maintenance of muscle tissue. Reducing protein at the same rate that fat is reduced can result in deterioration of muscle mass needed for vitality throughout the senior years. Eukanuba Senior Maintenance Formula supports muscle mass with precise levels of high-quality chicken protein, and is scientifically formulated for the special needs of a senior dog's digestive system. Eukanuba Senior Maintenance Formula contains an exclusive formulation of fibre (beet pulp and fructooligosaccharides) to nutritionally stabilize the senior dog's digestive system and support a healthy intestinal environment.