A tendon and ligament support for a limb joint, such as an ankle joint, in particular a horse's fetlock joint. A first collar (1) is adapted to embrace the limb above the joint and a second collar (3) is adapted to embrace the limb below the joint. A connection provides articulation between and separation of the two collars, and is adapted to provide limited elongation of the ligaments and/or tendons under load, and includes a resistance-exerting pivot arrangement (11) resisting joint flexion or extension over a predetermined range of joint rotation, and an essentially inelastic part (12) for limiting joint extension across the posterior side of the joint connected to one or more points on each of the collars, and preferably adapted so as to mimic an artificial tendon or ligament arrangement.