Death-camp-diet always works. They were overfeeding him, obviously!
One balogna sandwich per day and he would have lost weight in 15 years, guaranteed!
> Buy some ham or bologna (one pack) and some bread (one loaf) and buy a little jar of mustard. Then you make yourself a bologna sandwich. Put the bread down on the table, put the bologna on it. Spread the mustard on the bologna. Put another piece of bread on the bologna, then eat it with some milk. Then clean up.