A severe fit of colic, long continued, may end in enteritis. This is well known; yet it was not the colic which induced enteritis; but the real cause was that which originated the first affection. The predisposition must be present before the bowels would exhibit that inflammation into which the colic merged; the injudicious and cruel treatment most horses receive from those to whose service the life is devoted, may probably be accused as the root of all these evils; disease is the loudest proof that the life is stinted in some essential particular. The same food is placed before all horses; one animal will, however, purge upon exertion; labor, on the other hand, may constipate the fellow occupant of the same stable. When the same effect has produced such opposite causes, all the bodies cannot be alike; an old proverb asserts "that which is one man's food is another man's poison." The diet which supports one animal in health may loosen or constringe its companion; yet we are too ignorant to practically use such distinctions. Again, there is no practice more general than to load the rack and pile the manger after any uncommon toil has been endured. The practice may originate in the best intentions; but no intention can convert that which is evil into a positive good. The wretched animal is tempted to cram the stomach when excessive labor has weakened the vital functions. Horses which are brought home late at night do not usually receive much notice; the grooms are sleepy and eager for their beds. The dressing of the animal, however much such attention might conduce to health, is consequently left to the following morning. Rapid motion quickens the circulation; the blood is sent to the skin, and copious perspiration is the result. However warm the stable may be, warmth only promotes evaporation; cold of the lowest degree results from evaporation; the consequence is, the body of the quadruped speedily shivers; the blood is repelled to the internal organs, the bowels are prepared for inflammation, and thus enteritis often follows upon the midnight return from a long journey.