If the case is recent, shoe as advised in our paragraph upon "Incipient Unsoundness," being sure to cut the heel well down, putting the bearing fully upon the frog and three-quarters of the foot. If the hoof is weak from long contraction and defective circulation, lower the heels and whole wall, until the frog comes well upon the ground, and shoe with a "slipper," or "tip," made by cutting off a light shoe just before the middle calk, drawing it down and lowering the toe-calk partially. This will seem dangerous to those who have not tried it, but it is not so. The horse may flinch a little at first, from his unaccustomed condition, and from the active life that will begin to stir in his dry, hard, and numb foot, but he will enjoy the change. The healing of the crack will be from the coronet down, and it is good practice to cut with a sharp knife just above the split, and to clean all dirt and dead substance out from the point where you cut, downwards. Soaking the feet in water will facilitate a cure by quickening the growth of the hoof; or, a stimulating liniment may be applied to the coronet, to excite more active growth. Bear in mind that expansion is not from the sole upwards, but from the coronet downwards. TOE CRACKS. The cause of this defect is the same as in quarter crack. It appears in both fore and hind feet. Clean the crack well, cutting with a sharp knife the dead horn from each side of it; shoe as advised for quarter crack, or for the purpose of getting expansion and natural action of the dead, shelly hoof. The dirt and sand may be kept out of the crack by filling it with balsam of fir, or pine pitch. Keep the horse at regular work. [Illustration: QUARTER CRACK--HALF SHOE.] CHAPTER VI. DROP SOLE AND PUMICED FOOT.