Acute congestion of the lungs is a serious condition, and is often seen in horses called upon to do severe fast work when not properly prepared, and especially when brought into hot stables. Indeed, over-heated and badly-ventilated stables are a common cause of congestion of the lungs. Horses in high condition, or plethoric, are also liable to attacks. Debility-may also bring it on, and it is often an accompaniment or sequel of a cold, or exposure to severe weather. If not quickly relieved, the horse will die, or the congestion will pass on to inflammation of the lungs.

The horse breathes hurriedly, the nostrils being widely dilated, and the face anxious; the head and neck are extended, and the front limbs wide apart, all the limbs being icy cold, and patches of perspiration on the body.

An abundance of fresh air should be allowed; the legs should be well hand-rubbed and bandaged, and the body warmly clothed. It may be necessary to apply mustard to the sides of the chest; mild stimulants, as small doses of brandy, should be given frequently. But a veterinary surgeon should see the horse as soon as possible, as complications may arise, and delay is dangerous.