Viewed from the side, an over-angulated joint between the lower thigh and hock; an inability to straighten this joint when moving.

Describes an animal having a crooked hock, which causes the lower part of the leg to be bent forward out of a normal perpendicular straight line.

a conformational fault, describing a horse with weak hocks and with the cannon bone angled too steeply forward

A conformational fault in a llama where the hind feet come too far forward. This creates a sickle shape to the hind end when viewed from the side.

Sickle-hocked is the term used for saying that an animal's leg structure is incorrect. Sickle-hocked is when the back legs joints, of an animal are set with too much angle, resulting in the hock of an animal also having too much angle. This can result in uneven hoof wear, which is incredibly painful for the animal.