I have had a Shetland cross mare for a while. She was a rescue and suffers from heaves, has foundered before, and has cellulite on her neck. I've recently learned that my other Quarter Pony cross has foundered before and has a tiny bit of cellulite on her neck. They are currently on no grain, and not much grass at all. They are eating orchard grass mix hay. We are getting ready to buy our hay for next year, and my question is.. what kind of hay should they be eating? No alfalfa, correct? Is timothy okay? There is some affordable 1st cutting treefoil and clover mix square bales that are close to us. I'm a horse newbie here lol, and all I know is that with their conditions they can't have sugar and not super rich hay. Just not sure what kind of hay to give them.. thank you so much for any help!