she looks much better. Some horses are just hard keepers. Bahia grass should be a good protein /fiber feed. I use the senior feeds on all thin horses that come to me, simply because they are easier to digest. Brewers yeast is a form of vit b . You could add some vit e and c to see if that helps, I just crush an adult dose onto the feed . You may also try psyllium, maybe she is sanded . You can add more of the corn or canola oil (my vets and there are studies it does not make that much diff corn over canola) I also use soy oil . Beet pulp can be found w/o molasses . But if you can only find it w/molasses, it is usually such a small amt I don't think it will make a big difference. Look at the label for the sugar content. You could also try some alfalfa pellets added to the mix .