Join Date: Oct 2009
Location: Just south of sanity
You're asking about hard keepers, correct?
IMO, the best thing for a hard keeper is to make sure they have free choice hay in front of them at all times, free access to a mineral/salt block, and if you want to add more calories feed them beet pulp at least twice a day. More frequently would be better, but twice a day is okay.
As far as 'studies' to back me up, the only thing I have to go on are my 33 years of experience in owning horses. If you're looking for actual, published, verifiable data, you'll need to check professional and scientific publications.
You want the truth? You can't HANDLE the truth!