In the _subacute form_ the symptoms are less severe. The irregularity in
the gait is especially noticeable when the animal is turned quickly. The
local symptoms are less marked than in the acute form and the general
symptoms may be absent.

_The chronic form_ is characterized by changes in the shape and appearance
of the hoofs (Fig. 43). The wall shows prominent ridges or rings, the toe
may be concave, thick and long and the sole less arched than usual, or
convex. The degree of lameness varies. It is more noticeable when the horse
is moved over a hard roadway than if moved over soft ground. One attack of
laminitis may predispose the animal to a second attack.

_The prognosis_ depends on the character of the inflammation and the
promptness and thoroughness of the treatment. Acute laminitis may respond
to prompt, careful treatment in from ten to fourteen days. Subacute
laminitis responds readily to treatment. The prognosis is least favorable
in the chronic form.

_The preventive treatment_ is very important. Dietetic causes are
responsible for a large percentage of the cases of this disease. Horses
that are accustomed to being fed and watered at irregular periods and after
severe or unusual exercise seem to be able to stand this treatment better
than animals that are more carefully cared for, but even this class of
animals do not always escape injury. Stockmen should realize the danger of
producing an inflammation of the feet by feeding grain and giving cold
water to horses immediately after severe exercise. Overfeeding should also
be avoided. Careful nursing may prevent the occurrence of laminitis as a
complication of other diseases.