The colt should be altered at about one year, but if thin in the neck and light before, the operation may be deferred to such time as the requisite development is secured. Few of the French diligence and farm horses, and scarcely any of the Oriental, are ever castrated. They are thought to be more hardy and enduring; but the slight advantage they may possibly possess in this respect, would hardly compensate for the trouble and inconvenience too frequently arising from their management. The operation should be performed late in the spring or early in autumn, while the weather is mild. If in high condition, the animal must first be bled and physicked. If large and fractious, he must be cast. Some back him into the angle of a worm fence, where he is firmly held by the head with a bridle, and the operator accomplishes the object without any trouble or material restiveness from the animal while standing. The scrotum should be opened on both sides, and the testicles cut, or rather the cord scraped off, which prevents much bleeding. The wound may be dressed with a little lard; then turn him loose in a pasture which has a shelter from sun, wind, or rain. Another method of castrating is by _torsion_, or twisting. Docking Is practised by many, but merely to gratify an absurd and cruel caprice, without a single advantage, and the animal is better in every respect with the tail unmutilated. If done at all, it should be when young, and with a single stroke of the knife, or chisel and mallet; and if the weather be favorable, no further attention is necessary. Nicking. This inhuman custom is now getting unfashionable, and we omit any description of it. Breaking. While feeding in the stable, the colt should be gently treated, and accustomed to the halter and bit, which prepares him for breaking. If permitted to run with the others while at work, he becomes familiarized to it, and when harnessed by the side of some of his well-trained mates, he seems to consider his discipline rather a privilege than a task. The colt may be taken in hand for breaking at three years of age, and thoroughly broken to light work at four, but should not be put to hard service till six or eight. A due regard to humanity and sound judgment, in thus limiting the burden in his early years, would save much disease and suffering to the animal, and profit to the owner, by his unimpaired strength and prolonged life. The annual loss from neglecting this precaution is enormous, which might be entirely avoided by less eagerness to grasp the substance, while as yet the shadow only is within reach. Many animals are thus broken down at twelve, and are in their dotage at fifteen, while others of good constitution, if well treated, perform hard service till thirty. Longevity of the Horse.