The holes must be punched fine and the nails be quite short and strong. On each shoe a long tongue should be made on the inner edge near the toe, and so directed that it can be turned upward and outward to embrace the toe of the claw. A small clip raised on the outer toe of each shoe will increase its stability. In some parts of Saxony the shoes are so made that the tongue of each shoe begins in the rear third of its inner edge and runs forward, upward, and outward, closely embracing the wall of the toe. The smaller clip is drawn up on the outer edge of the shoe close to the toe. These shoes are more difficult to make, but when applied sit more firmly and remain fast longer than all others. Machine-made ox shoes (Fig. 227) have no clip at the inner toe, and are frequently pulled and lost. For this reason they are inferior to hand-made shoes. An undivided shoe (the so-called “closed claw-shoe”) is unsuitable for oxen, because it deprives both claws of their natural, free movements. However, such a shoe is of advantage for heavy draft over hard and very rough roads, because it lessens the liability of the fetlock and coronary joints and the cleft of the claws to strains. [Illustration: FIG. 227. Pair of machine-made ox shoes, viewed from the ground-surface and in profile; _a_, toe-calk; _b_, heel-calks.] Great difficulty is often encountered in holding the feet during the operation of shoeing. It is necessary to fasten the head securely against a tree, post, or wall. A front foot may be raised and held by passing a slip-noose in the end of a rope or side-line around the fetlock and carrying the line over the withers to the opposite side, where it is held by an assistant. A hind limb may be controlled by passing a round pole in front of the hock of the leg to be raised, and, with a man at each end of the pole, carrying the limb backward and upward, in which position it is held; or the limb may be bent and controlled by tightening a twitch or tourniquet upon the leg just above the hock (Fig. 228). Oxen that continue to resist may sometimes be quieted by light blows of a short stick upon the base of the horns. In parts of the country where many oxen are shod stocks are in common use. [Illustration: FIG. 228. Hind foot raised by means of a round pole.]