poison) may be responsible for its development.

_Symptoms._--The symptoms usually appear suddenly and consist in inability
to stand. Sometimes this is preceded by a period of excitement. The animal
usually lies quietly, but sometimes it groans and tosses its head about in
a way that indicates pain. Cows heavy with calf are sometimes affected with
a form of paraplegia, which usually attacks them from about a month to a
few days before calving. Apparently they are in good health in every
respect except the inability to stand up on account of the paralysis of the
hind quarters. This form is generally attributed to feeding on feeds
containing insufficient protein and ash. It is most likely to occur in cows
that are weak and thin. With good care and feed recovery usually occurs.

_Treatment._--The animal must be given a soft, dry bed under shelter and in
a quiet, airy place. It is well to apply mustard along the spine. The
action of the mustard may be intensified by rubbing the skin with ammonia
or turpentine. Internally give a purge of Glauber's salt. Nux vomica or
strychnia (1 to 2 grain doses) may be given. Turn the cow two to four times
daily and rub the legs well each time.

There are instances when cows will persist in lying down (in spite of all
efforts that are made to compel them to stand up), when it can not really
be said that they are paralyzed. They have sensation in all parts; they can
move all their feet; they can change their position; and in fact every
function seems to be normally performed, but they obstinately refuse to
rise or even make an effort to do so. Cases of this kind have been killed,
as it was an utter impossibility to get the animal on its feet. However,
there are instances when a cow, after refusing to rise when all other means
had been tried, quickly jumped to her feet and showed fright upon the
appearance of a dog or other terrifying object.

RABIES (HYDROPHOBIA).

[See discussion of this disease in chapter on "Infectious diseases," p.
358.]

LIGHTNING STROKE (ASPHYXIA ELECTRICA).

When an animal is struck by lightning the shock is instantaneously expended
on the nervous system, and as a rule death occurs immediately; but when the
shock is not fatal animation is suspended to a greater or less extent, as
evidenced by prostration, unconsciousness, and paralysis.

_Symptoms._--When not fatal, the symptoms vary much, according to the
severity of the shock. The animal usually falls, a