Join Date: May 2009
Location: Mid Northern TN
3/4 of a pound of senior feed is nothing. I mean, literally, almost nothing. Senior feeds are intended to be fed at amounts of 5-10lbs a day, to start with. At the high end, a horse might eat nothing but senior feed and get 20lbs a day split into multiple feedings.
I would keep giving him the hay, but as it sounds like he is not getting what he needs from it, you you need to add in other sources of calories. You could go with a senior feed or a complete feed, but I'd start out with at least 5lbs/day and go from there. Hay pellets, beet pulp, and rice bran are other good sources of calories for horses who need a little more. Finally, if those aren't doing it, adding a fat source like vegetable oil or stabilized fat products like cool calories can be helpful.