HEELS
.—The heels of a horse, critically speaking, imply only that part of the hoof which is the very reverse of the toe; seated behind, and forming the back of the foot, across the widest end of the frog, extending from one point of the heel to the other. Custom has, however, so far extended both the idea and the expression, that in the present general acceptation of the word, it is admitted to include the feet as high as the fetlock-joint; so that the heels are subject to accidents, inconveniencies, defects, and blemishes, as CRACKS, SCRATCHES, OVERREACHES, GREASE, &c. The heels of a horse, to be good, should be high, (that is, of a proper length from the hair above to the ground below,) firm, and substantial, open on each side the frog, and never should be cut down too low by the destructive instrument of the SHOEING-SMITH; an error in both judgment and practice, to which may be justly attributed the frequent failure in the back sinews; for where the heels are unnaturally reduced, and the tendons in part deprived of their support, they have evidently to encounter a preternatural distension, by which the elasticity is partially destroyed, and some of the fibrous coats consequently ruptured.