Your big dog has big nutritional needs, especially as they get older, so feed them IAMS PROACTIVE HEALTH Mature ADULT large breed dog food. Iams’ delicious recipe is specifically formulated for your senior dog. With real chicken as the first ingredient, this dry dog food promotes strong muscles with quality protein. This IAMS recipe features wholesome grains and garnishes of veggies in every meal. It has all the essential vitamins and minerals Big dogs need for healthy bones and joints and maintaining strong immune systems, plus a crunchy kibble that helps clean teeth. See why vets recommend IAMS: give your old dog something new with IAMS PROACTIVE HEALTH Mature ADULT large breed dog food, for nutrition as unique as they are.