The only photo I seen on the ad you could tell his hip bones and his back bone were protruding a little, as well you could see his ribs through his winter. I'm assuming he's got worm belly and that's part of it. I would say he's probably a good 75 pounds under weight?? Its not horribly bad but he's not fat enough.
He's getting wormed first day he gets here. Shots, teeth floating, feet done, gelding ect. But what feed do you recommend I feed him? I have sweet grain. I also have hay and what not. The lady who has him, I guess her parents moved and when they moved, they left him there and she has no idea how to take care of him. She's selling him for 100, our trailer car puller broke down and we can't pull the trailer so she's renting one for 40 and I'm paying her 25 in gas. So its 175 all together.
I don't plan on keeping him. I plan on getting him fat and putting a little foal training on him. Waiting a while and then giving him to a good home.