Blue Buffalo Life Protection Brown Rice & Chicken Recipe Dry Food for Senior Dogscombines natural ingredients for small, medium and large breeds. This formula contains BLUE's exclusive LifeSource Bits, which is a precise blend of antioxidants, vitamins, and minerals carefully selected by holistic veterinarians to support immune systems health. Blue Buffalo recipes always feature real meat as the first ingredient and contains the essential proteins and carbohydrates to meet your senior dogs daily energy needs.