Thank you very much.. we feed a really good diet..alot of credit goes to MFK... we learned so many more foods that they like.. every morning they have a few slices of banana... have zucchni often, sliced carrots, peanuts once in awhile.. and algae pellets and frozen krill..they love to eat..also schrimp pellets..so they have a pretty varied diet to stay healthy. They don't have any damage .. they do press their nose up against the glass once in awhile and it gets a little red once in awhile, haha.