I realize I need to tell you guys what he's currently eating, but I need to call the barn manager where he is and actually write it down instead of trying to remember. Basically it's a high fat sweet feed with oats and alfalfa pellets mixed in, but I can't remember the brands or the type of oats.
I want to ween him onto strategy healthy edge with high quality hay twice a day. I've been told by the woman who does horse rescue for the local shelter that she uses this feed, wet down into a mash, adds corn oil, and it works just as well as the high fat diets. If he was severely underweight I'd keep him on his special diet, since it seems to be working great for him, but she, and three other people, have agreed that he can gain the 200 lbs easily with good nutrition and light exercise to help build muscle.
I will be posting the feed info tomorrow when I can call, but so far what are your opinions on my plan? How would I ween him off of his current diet? I know how you do it with dogs, but my dogs have stomachs of iron and I have never transitioned food on them so this is all new to me.