I'm asking this for my friend Krista who can't get on the internet on a regular basis right now. She wants to know what you OTTB owners feed to put weight on? Jordan is about 300 pounds underwight. Right now he's getting an Alfalfa/orchard grass hay mix and she's going to get him some equine senior for the extra calories even though he's only 6. She's also wondering about weight gain suppliments...........do they work? Are there any in praticular that work best? Thanks for any help!