I had a 26yr horse die of colic last year, and what my vet said to do to help prevent it in my other horses, is to give them a dose of psyllium twice a week.
So I have been giving them about 4 oz. Twice a week. It gets rather expensive, but I sure don't want to loose another horse to colic if I can help it.
Any thoughts on this? Or if 4 oz. Is an appropriate dose?
It's not to remove sand so much as just to keep their digestive system moving along well. We are not in an area prone to sand colic (according to my vet) and I have alway used feeders for their hay. He feels that older horses are prone to impactions and the psyllium can help. I didn't ask what he considered "older" though, so I am feeding it to my 16yr old, 17 yr old as well as the 30 year old.