_The symptoms_ are difficult breathing and the animal fights for its
breath. The body temperature may be several degrees above the normal. In
the mild form, the above symptoms are not so marked. The onset and course
of the disease are rapid, recovery, pneumonia, or death often occurring
within twenty-four hours.

_Pulmonary haemorrhage_ is not uncommon. The discharge from the nostrils
may be slightly tinged with blood, or there may be an intermittent
discharge of blood from the nostrils or mouth. The mucous membranes are
pale, the animal trembles and shows marked dyspnoea.

_The preventive treatment_ consists in using the proper judgment in caring
for, and in working or exercising animals. This is especially true if the
animal is affected with acute or chronic disease. At the very beginning,
bleeding should be practised. Hot blankets renewed frequently and bandages
to the limbs is a very necessary part of the treatment. In case of severe
pulmonary haemorrhage, treatment is of little use.

PNEUMONIA.--Inflammation of the lungs is more common in horses than in any
of the other domestic animals. The croupous form is the most common. The
inflammation may affect one or both lungs, one or more lobes, or scattered
lobules of lung tissue. The inflammation may be acute, subacute or chronic.

_The causes_ are very much the same as in other respiratory diseases.
Exposure to cold and wet, stable draughts, becoming chilled after
perspiring freely and washing the animal with cold water are the common
causes of pneumonia. Inflammation of the lungs is especially apt to occur
if the animal is not accustomed to such exposure. Animals affected with
other respiratory diseases are predisposed to pneumonia. Drenching animals
by way of the nostril and irritating drenches, or regurgitated feed passing