Broken Wind, a disease of the lungs of the horse, incapacitating him from all violent and rapid exertion. It is immediately recognizable by the manner of breathing. The inspiration is performed in somewhat less than the natural time, but with an increased degree of labor; the expiration is accomplished by a double effort, in the first of which the usual set of muscles operate, and in the other the auxiliary muscles, particularly the abdominal, are put on the stretch, to complete the expulsion more perfectly; and that being done, the flank falls, or the abdominal muscles relax with a kind of jerk or spasm. Broken wind is preceded or accompanied by a characteristic cough, seemingly cut short, grunting, and followed by wheezing. The disease is believed to be hereditary, and in some degree consequent on malformation, on a narrow chest, a fragile membrane, and a predisposition to inflammatory diseases. Horses which are greedy feeders, and distend the stomach with large quantities of innutritious food, of which they do not readily get rid, are peculiarly liable to broken wind; which may also be produced by giving a horse a severe gallop on a full stomach, even where there may have been no previous chronic affections.

When a horse is once thoroughly broken-winded, there is no cure, the structure of the lungs being permanently injured. The food should be the most nutritious, and that which will lie in the smallest compass - good oats, little hay, no chaff. Green food is particularly beneficial, and carrots appear to have a direct effect on the respiratory organs.