Thats a new one on me
I got this from http://www.barefoothorse.com/barefoot_Founder.html
The conventional drugs given to horses with laminitis are often contradictory in their effects, and therefore confusing to the horse's system; they should be stopped. Painkillers can be used if he refuses to eat, drink, or move around on his own, then taper off over several days. Homeopathic remedies or herbs can also help with pain.
Feed should be grass hay (no alfalfa) available 24 hours. To provide a variety of vitamins and minerals, offer turnips, rutabagas, kale, collards, mustard greens, carrot tops; and local weeds and tree leaves that the horse likes.
To help the immune system, stop blanketing. Unlike the horse's own hair coat, a blanket cannot adjust its thickness to temperature fluctations; so the horse can get chilled or overheated, both of which are over-stress the immune system. A clipped horse can grow enough coat in a few days; remember he's not in a stall now, he has room to move around when he gets cold.
Foundered horses sometimes stand in cold water for long periods to relieve heat and pain. You can offer a free-choice water- or mud-hole, or soak the feet in cold water with a little cider vinegar added.
For horses with laminitis caused by Cushings or insulin resistance, take a look at www.ruralheritage.com/vet_clinic/epsmdiet1.htm
Horses with laminitis often need extra magnesium. You can get some at the health food store and offer free choice. A highly bio-available form of magnesium for horses is sold as a supplement called Quiessence. Insulin-resistant (IR) horses are helped by 1/4 teaspoon of cinnamon daily (but don't give cinnamon to horses that are not IR). Also the Chinese herb Jiao gu lan, 1/4 teaspoon twice daily, can help the foundered IR horse.