The effect of slight fermentation, or souring the food, produces the same result. Animals accustomed to this acid food, will reject what is unprepared when they can get at the former; and we have no doubt, from our own experience, that there is a saving in thus preparing it, from 20 to 40 per cent. A mixture of food should be supplied to all animals. Like man, they tire of any constant aliment. For such, especially, as are fattening, and which it is desirable to mature with the greatest rapidity, a careful indulgence of their appetite should be studied. They should be provided with whatever they most crave, if it be adapted to the secretion of fat. Cutting, crushing, and grinding the food; cooking, souring, and mixing it, are each by themselves an improvement for feeding; and frequently two or more of these preparations combined, are of great utility in effecting the object proposed. The Profit of Feeding. It is evident, that this consists in a valuable return from the animal of the food consumed. In the horse, this can only be received in labor or breeding; in the ox, from labor and flesh; in the cow, from the milk, the flesh, and her young. In the sheep, it may be returned in its fleece, its carcass, or its progeny; and in the swine only by its progeny and flesh. The manure we expect from all; and if this be not secured and judiciously used, few animals about the farm will be found to yield a satisfactory profit for their food and attention; though it is evident, it should form but a small part of the return looked for. Animals are only profitable to the farmer, when they yield a daily income, as in their milk or labor; or annually, by their young or fleece; unless it be in a course of regular improvement, either in their ordinary growth or preparation for the butcher. The animal must consume a certain amount of food merely to keep up its stationary condition, and to supply the materials for waste, respiration, perspiration, and the evacuations. These must first be provided for in all cases, before the farmer can expect any thing for the food. Frequent observation has shown, that an ox will consume about two per cent, of his weight of hay per day, to maintain his condition. If put to moderate labor, an increase of this quantity to three per cent., will enable him to perform his work, and still maintain his flesh. If to be fattened, he requires about 4½ per cent. of his weight daily, in nutritious food. A cow to remain stationary and give no milk, eats two per cent. of her weight daily; and if in milk, she will consume three per cent. If these statements are correct, which it is certain they are in principle, though they may not be entirely in degree, it will require the same food to keep three yoke of cattle in idleness, as two at work; and the food of every two that are idle, will nearly support one under the most rapid condition of fatting. Two cows may be kept in milk, with the same feed that will keep three without.