Right now have them both back on Nutro Natural Weight management food. Max didn't do so good at first on it as he was eating to fast and throwing up as the food is pretty big. I switched him to Iams Adult for a few weeks and he is now back on Nutro. I've tried Nutro Max Cat and they both hated it. I've tried Purina One which they both loved but their digestive systems didn't. Tried another natural food but that didnt' go over well either. I need to feed them some can food but haven't lately as their systems don't seem to like it much but when I did I fed the Natural Balance and Nutro in the can... Debbie