200 DISEASES OF THE HORSE’S FOOT 
in the decreased amount of discharge from the opening in 
the sole. 
Should pain unfortunately continue, the discharge re- 
main, and a state of fever reveal itself, then it may be 
understood that the suppurative process has not been 
checked, that a portion of necrosed ligament, cartilage, or 
bone still remains, which, surrounded as it is by pus 
organisms and putrefactive germs, is sufficient to excite a 
constant irritation and maintain the internal structures in 
a state of infection. In other words, we have what is known 
as a quittor. 
This will call for deeper operation. The horn of the 
wall must be removed, and the diseased structures, whether 
gangrenous keratogenous membrane, necrosed ligament, or 
carious bone, carefully excised or curetted. This will be 
better understood by a reference to the chapter on Quittor, 
where the means for carrying out the necessary operative 
measures will be found described in detail. 
Surgical Shoeing for Corn.—In the case of an ordinary 
dry corn, where the injury has been definitely ascertained 
to be accidental, no alteration in the shoeing will be neces- 
sary. Where, however, the corn is attended with a more 
than ordinary degree of inflammation, or where for some 
reason or other excessive paring has been practised, then 
it will become needful to shoe with a special shoe. The 
object to be attained is the removal of pressure from that 
portion of the wall next to the seat of corn. 
The most simple shoe for effecting this is the ordinary 
three-quarter shoe. The only way in which this differs 
from the ordinary shoe is that about an inch and a half of 
that branch of the shoe adjoining the corn is cut off 
(Fig. 102). If at the same time contraction of the heels 
exists, then, perhaps, a better shoe is that known as the 
three-quarter bar (Fig. 108). 
Or, if preferred, a complete bar shoe such as that 
described for sand-crack may be used, and the upper 
portion of the web in contact with the foot at the seat of 
corn thinned out so as to avoid pressure on the wall at this 
