Currently his diet looks like this:
-3 scoops of alfalfa cubes(totaled to 6 pounds)
-3/4 scoop of timothy pellets (2.5 pounds)
-1 scoop alfalfa cubes (2 pounds)
-3/4 scoop timothy pellets (2.5 pounds)
-1 lb of ration balancer
He is on grass turn out day and night, because he is also a cribber, especially when stalled so in an effort to keep it to a minimum he's just out all of the time. He does wear a collar, and as long as he has grass he's pretty good about not cribbing, but there are sometimes, usually if he's hungry, that he cribs through the collar. All of those bad tasting pastes and paint don't work, I have tried them previously.
As far as actual fat building, I have tried beet pulp and rice bran with little results--mostly just a better looking coat. He is doing absolutely nothing, no work, I mean he really is just turned out and brought back in to eat, and then he goes out again. He is turned out by himself because he thinks he's a stallion and just runs everyone around and bullys them, except for this one little pony mare he's in love with (she's half his size and she beats him up, its the cutest thing) so he doesn't do anything except eat out in the pasture either. He was wormed four weeks ago exactly, and I had a fecal egg count done last weekend to make sure his worm load was low to rule out that as a culprit as well. I also plan on having him scoped for ulcers this month, but overall he's been given a physical and cleared as healthy; his appetite and his attitude are good.
So, having said all of that, any suggestions would be helpful! Keep in mind that I am trying to stay away from grain-based hard feed because of his more than likely case of ulcers, and sweet feed is an absolute no no.