ng almost inelastic and not well supplied with blood, tendinous
tissue is slowly regenerated, and so much time is required for complete
recovery to take place in tendinitis, that affected animals seldom fully
recover before they are in service or vigorously exercising at will. As
a result, complete recovery is delayed or prevented.

The extensor tendons, because of the nature of their function, are very
seldom strained; they are often bruised and occasionally divided, but
unlike this condition in the flexors, tendinitis of the extensors is of
rare occurrence.

For a concise discussion of this subject the most practical
classification is one made on a chronological basis and we may then
consider tendinitis as _acute_ and _chronic_.

ACUTE TENDINITIS.

Etiology and Occurrence.--Causes of tendinitis, as in almost all
diseases, may be considered under the heads of predisposing and
exciting. Among the predisposing causes of tendinitis may be mentioned,
faulty conformation. Everything which has to do with increasing the
strain upon tendons adds to the probability of their being over-taxed.
Long, sloping, pastern bones; disproportionate development of parts,
such as a heavy body and small, weak tendons and long hoofs, are the
principal factors which usually predispose to tendinous sprains.
Degenerative changes which take place in tendons following
constitutional diseases such as influenza may also be classed as a
predisposing cause.

Excessive strain when put upon tendons in any possible manner, such as
is occasioned in running and jumping; making missteps and catching up
the weight of the body with one foot, when the force thus thrown upon
the supporting structure is great because of momentum gained at a rapid
pace, are exciting causes of tendinitis.

Symptomatology.--In all cases of acute tendinitis there is presented a
characteristic attitude by the subject. Volar flexion in a sufficient
degree to relax the inflamed structures is always evident. The foot may
be rested on the toe or placed slightly in advance of the one supporting
weight, but the fetlock is always thrown forward. More or less swelling
of the inflamed tendons is present. Where the deep flexor (perforans) is
involved swelling is marked and with swelling there is present the other
symptoms of inflammation--heat and supersensitiveness.

In manipulating tendons for the purpose of detecting supersensitiveness,
care must be taken so that no false conclusi