_The Canine Asthma_ is hardly ever observed to attack any but old dogs, or those who, by confinement, too full living, and want of exercise, may be supposed to have become diseased by these deviations from a state of nature. It is hardly possible to keep a dog very fat, for any great length of time, without bringing it on. This cough is frequently confounded with the cough that precedes and accompanies distemper; but it may be readily distinguished from this, by an attention to circumstances—as the age of the animal, its not affecting the general health, nor producing immediate emaciation, and its less readily giving way to medicine. The cure is often very difficult, because the disease has in general been long neglected before it is sufficiently noticed by the owners. As it is in general brought on by confinement, too much warmth, and over-feeding, so it is evident the cure must be begun by a steady persevering alteration in these particulars. The medicines most useful are alteratives, and of those, occasionally, emetics are the best. One grain of tartarised antimony (_i. e._ tartar emetic), with two, three, or four grains of calomel, is a very useful and valuable emetic. This dose is sufficient for a small dog, and may be repeated twice a week with great success—always with palliation. * * * * * It derives its origin from the artificial mode of life forced on pet and fancy dogs, whose close confinement and over-feeding lead to an extraordinary accumulation of fat: and according to the degree in which these predisposing causes have been applied, the disease appears earlier or later in life. In some it comes on at three or four years old: in others, rather less artificially treated, it may not appear until seven or eight. In some cases, the irritation of the cough, and the accompanying hectic, emaciates and wears down the animal: in others, the pulmonary congestion stops respiration, and kills by a sudden suffocation; or the obstruction the blood meets with in its passage through the heart, occasions accumulation in the head, and convulsive fits are the precursors of death. Now and then a rupture of the heart, or of some large blood-vessel, suddenly destroys: but by far the most common termination of the complaint is in dropsy, or serous collections within the chest or belly, or both, but most frequently of the latter. In these cases, the limbs and external parts of the body waste, but the belly increases in its size; the legs also swell; the hair stares; the breathing becomes very laborious; and, in the end, suffocation ensues.