That such a practice does not tend to the improvement of the health of an animal is perfectly evident, but then the perfect ox of nature is very different from the perfect ox of man. The latter is a wide departure from the original type of its species: any marked development of its nervous system is undesirable; and it is valuable in proportion as its purely vegetative functions are most strongly manifested. A young bullock, therefore, of this kind would, no doubt, be the most economical kind to rear, provided that it was perfectly healthy, and capable of assimilating the liberal amount of food supplied to it. But it rarely happens that a young animal with a weakly chest turns out other than a scrofulous or otherwise diseased adult. On the whole, then, I am disposed to believe that whilst naturally small-lunged species may be more prone to fatten than large-chested ones, it is not the case that small-chested individuals fatten more rapidly than larger lunged individuals of the same kind. The conditions under which oxen, sheep, and pigs have been so long maintained in civilised countries, must have diminished the capacity of their chests in relation to other parts of their bodies; and it may be fairly doubted if any good could result by reducing to still smaller dimensions those most important organs. Probably the lungs and hearts of the improved breeds of stock are already too small, and that it is only the individuals which are least affected in this respect that answer to Mr. Bowly's description of a fat-disposed beast. Whether or not small lungs are desirable in a bullock or milch cow, it is certain that a ram or a bull should be possessed of a capacious chest, for otherwise he will have but little vigour, and will be likely to produce a weakly offspring. A sire should be a perfectly developed animal in every respect--sound lungs and heart, and not over fat. It is sufficient that it belongs to a good fattening breed; but to produce offspring with a tendency to fatness and early maturity, it is not necessary that the sire should himself be obese. It is to be regretted that so many sires of the Shorthorns and other improved varieties should be used for breeding purposes, when their hearts and lungs have become, by over-feeding the animals, unfitted for the proper discharge of their function. The progeny of such sires must _naturally_ inherit the _acquired taint_ of their diseased progenitors, and prove weakly and unhealthy animals.