g of his own. The
animal was in good condition, but walked with difficulty owing to the pain.
The coronary bands were swollen to two or three times their natural size,
and this caused the hair immediately above to curl upwards. Just below the
coronary bands there was a line of separation between them and the wall.
They themselves were covered with the cheesy substance typical of canker,
and they bled on friction. Down the wall of the off fore-foot some blood
had trickled, which may be seen in Fig. 138. The frogs of all four feet
bulged backwards, and were badly affected. The soles were covered with
normal horn, but I did not resort to paring to see if they were affected.
One very curious feature about the case was the fact that all the
callosities (ergots and chestnuts) seemed to participate in the morbid
process, and they, too, were covered with a thin layer of soft cheesy horn.
The animal used to bite at his coronets and also the callosities above the
knees and hocks until they bled, which they did quite easily. The owner
would not go to the expense of having him treated, so he was destroyed.[A]

[Footnote A: Henry Taylor, _Veterinary Record_, vol. xvii., p. 311.]

CHAPTER X

DISEASES OF THE LATERAL CARTILAGES

A. WOUNDS OF THE CARTILAGES.

To a consideration of this we shall devote but little space. It is
sufficient to say that any wound in the region of the coronet should always
be given the most careful attention. More particularly should this be so
when it is ascertained that the wound has involved one of the lateral
cartilages. Wounds of non-vascular bodies such as these are always slow to
heal, and, by reason of their slowness, invite septic infection. In many
cases, in fact, it happens that they do not heal at all. Instead, the
injured part becomes necrotic, is unable to cast itself off, and remains as
a centre of infection in the depths of the wound, thus constituting what is
known as a quittor.

Apart from this, it will be remembered that the internal face of the
cartilage is in intimate contact with the pedal articulation, especially
anteriorly. Wounds in this situation are, therefore, likely to penetrate
the joint, giving us as a complication of the injury the conditions of
synovitis and arthritis.

Immediately a wound is inflicted in this position, attempts should be made
to insure thorough asepsis of the part. When possible, by far the better
way of accomplishing this will be to wholly immers