Good hooves start from the inside out. If you want to know what's going on inside a horse, just look at the hooves. They are the window to the health of a horse. I'd look at the feeding program this horse is on first. She might want to add some ground flax (1/4 cup to a half per day), maybe some biotin, to the feed program and see how that goes. It might take a month or two to see the results. I'd also have my hay and feed looked at to see what is missing for vit/minerals and supplement accordingly based on those results.
ETA: Just an all round vet check to make sure there isn't something else going on that is contributing to it. I'd also look at the terrain the horse is on. Is it too wet, too dry, is that maybe part of the problem.
Last edited by Crickett; 11-08-2010 at 02:32 PM.