Thanks for your advice! I would be doing all of those things but my boarder is the one on the budget. She doesn't want to spend a bunch of money on him but maybe since we are switching him to pasture board I can get her to add a little more to him.
(Don't want to come off strong or a know it all.)
What should the mares mature weight be? and how under is she? If this mare is a 1,ooolb mare i would feed 12lbs of grain/day. split between Strat and the t. Crown until the mare starts showing inmprovement as well as lots of hay.
I use strat as well and I like it. I also add Eq. Senior to some and T.Crown complete. On a buget, it can be kind of hard but weight builder,Ult Finish (buckeye) are great sorses of putting on weight, I would try adding a 1/2 cup of corn oil to each ration of feed, as well.
As for the mare not eating all of her hay I would try wetting and putting a little salt on it. or finding a mix with little alfa and timithy. (have no idea what kind of hay you feed)
I only give these sugestions because i have been through this with T.B's and rescues.
I hope this has helped, and let me know the results.