My best gelding Jericho did this injury by getting
caught under a board fence when rolling. He was 18 at the time, but still
competing. This was in 1996 or so. The vet told me to keep him
completely inactive so that the ligament could reattach, which I did for 6
weeks. Then stall rest for it to really be solid, for another couple
months. He ended up sound with the injury, but the period of not being
used allowed arthritis to really take off. He was diagnosed with bad
arthritis in the hocks and fetlocks of the rear legs the following year.
He was retired then, but the vet encouraged me to trail ride lightly to keep it
in check. He he had done another AERC ride or two after the injury, but
before the arthritis diagnosis if I recall correctly...