One way to tell about Snowy's digestive system is the poop. If his stools are firm (not runny) then he is handling the amount and kind of people food okay. If you are getting loose stools occasionally, then you might want to rethink what he is eating. My two are on Lamb and Rice Iams as well and love it. They get small pieces of fruit an and vegetables as treats. Just remember no onions on that hamburger and as we learned from another post on this board, grapes are now suspect.