Club feet are often the result of tension of the Deep Digital Flexor Tendon (DDFT) that runs down the back of the limb and attaches to the coffin bone. They can be the result of genetics or habitual stances (always nursing with the same foot forward, etc). If caught early, when still a foal, there are things that a vet and farrier can do to minimize the "clubbiness" foot (check ligament desmotomy with tip shoes, etc).
If your horse is not a foal, the best thing you can do for it is to maintain regular, professional farrier care. By helping your horse to get a heel first landing on all four corners (or close as you can, a severely clubbed foot sometimes cannot), you can offer relief to the DDFT. Since tendons are not elastic, it is important that your horse is trimmed and/or shod to offer the best base of support at the back of the foot to help eliminate tendon tension that could result in lameness. With proper and consistent care by a capable farrier, I have seen many clubbed footed horses live relatively pain-free, and athletic lives.
Last edited by Rialto; 01-21-2014 at 02:59 PM.