Any idea where I would check that out? SHould I just ask my vet? The receptionist is kind of a ditz there.
I'm not feeding him much grain. A yogurt container scoop twice a day, which is nothing compared to what he and the rest of the skinny horses at the previous barn ate. It keeps the weight on him, but I'd rather feed him something better.
He's not getting chased away, as he's the only horse in there. He basically has free hay all day, since the quarter bale I give to him twice a day lasts all day and night. He goes and eats his fill, and then wanders off. So the problem is more his appetite than anything. He's also up to date on deworming.