Galle, Sp. agalla, a wind-gall or puffy distension of the synovial bursa on the fetlock joint of a horse, is derived from the Lat.
The hackney should also possess good hock action, as distinguished from mere fetlock action, the propelling power depending upon the efficiency of the former.
The withers may be moderately high and thin; the chest well developed, but not too wide or deep; the shoulder should lie well on the chest, and be oblique and well covered with muscle, so as to reduce concussion in galloping; the upper and lower arms should be long and muscular; the knees broad and strong; legs short, flat and broad; fetlock joints large; pasterns strong and of moderate length; the feet should be moderately large, with the heels open and frogs sound - with no signs of contraction.
The inside of the ears and the muzzle are black, and the feet are black to the fetlock joint.