Give your older large-breed pooch a big bowl of healthy benefits with IAMS Mature Adult Large Breed Dry Dog Food for Senior Dogs with Real Chicken. This dry dog food features real farm-raised chicken as the first ingredient. It’s formulated with key nutrients for healthy bones and joints—important for your older, large-breed canine. It contains antioxidants for immune system support and it contains a wholesome blend of prebiotics and fibers to promote healthy digestion. It’s a beneficial meal for your very best big-breed buddy!