A swelling on the back part of the hind leg of a horse, just behind the lowest part of the hock joint, generally causing lameness.

Inflammation and thickening of the plantar ligament (the ligament that courses along the back of the calcaneus bone in the hock).

used in conjunction with double bridle, pelham, kimblewick and the like, it is a chain that fits from one side of the bit to the other under the chin; an injury to the hock

A thickening of the plantar ligament of the hock.

Thickening of the tendon or ligament below the point of the hock, resulting from a strain.