Both my gelding and mare have bad grass bellies. They aren't fed oats or hay in the summer time, because we have good grass, but they still gain weight. They are healthy, just really fat. Is there a way to get rid of the grass belly other than exercise?
Here are pictures of them so you can get an idea...
[He has always been overweight. I'm not sure he just has a low metabolism and puts on weight easily or what]