The rapidity is various with which animals take on fat, much depending on hereditary predisposition, and the nature of the food; and much also on the state of the atmosphere, and quiet habits; a moist and rather warm air tending greatly to the advancement of the process, some birds becoming fat in twenty-four hours of wet weather. Children that have been emaciated by diseases often resume their original plump condition in a few days; and animals that have been famished, as hogs, afterwards fatten very rapidly. Moderate and repeated bleedings, mild farinaceous diet, and emasculation conjoined, tend to the repletion of the body, and to the speedy deposition of fat; yet it would appear, that when acquired in this rapid manner, it never possesses the value in a culinary point of view, that is yielded to such as has been slowly formed, when, as one may say, the worthless particles have had time to be removed, and the remaining part to become a firm and healthy deposit. It is partly owing to this, that animals are never at their best when forced to take on fat at an early age, but are most esteemed by the gourmand when they, as in the case of the sheep, have lived from three to four years. (83.) _Tendency to acquire Fat._--A disposition to early obesity, as well as a tendency to that form which indicates a propensity to fatten, is materially promoted by a good supply of rich food, while the animal is in a growing state. The Spanish shepherds are so well aware of this, that half of the lambs are annually killed, that the survivors may obtain every indulgence in the way of milk. Care should be taken never to place animals suddenly on food much superior in feeding qualities to what they have left. Very lean sheep are never put to full turnips in winter, nor to rich pastures in summer, but are prepared for turnips on good grass lands, and kept on second years' leys, and afterwards given a moderate allowance of turnips if they are to be fatted on pastures. It is an invariable rule with all good managers, never to allow this or any other animal, reared solely for the shambles, to lose flesh from its earliest age till it is sent to the butcher as more food is necessary to bring it to a certain condition than to keep it at it. In the case of the Dishleys, it is customary to keep all in a state of fatness, except those intended for breeding, and after full feeding on turnips during winter and spring, to finish them on the first year's clover early in summer, when the prices of meat are usually the highest; so that this variety is always fit for market at eighteen months, while the Highland breeds, though prepared by means of turnips, a year at least, sooner than in former times, do not usually go to the shambles till from three to four years old.