Stacy: I have heard that there are disadvantages to beet pulp. You may want to discuss it with your vet. Here is the link to the product that I mentioned yesterday. As for oil, there is a product called Coca-Soya that we used during a rehab after my quarter horse injured her back at the vet's recommendation. It's pricey, though, and it was really hard to get her to eat it. (And messy. And hard to store. And did I mention expensive? ;) )
(ETA: The two horses that we have in addition to the old guy are mares, one the QH mentioned above and the other a Fjord. Both have metabolic issues. I have both on half the quantity of senior weight accelerator as the gelding. All three wintered beautifully; no colds, no coughs, good movement. Their feet are FANTASTIC and their coats are BEAUTIFUL. I have been really surprised by how much benefit they derive from such a small amount of a supplement.)