46 6 
A. ZUNDEL. 
stumbles on his fetlocks, and often falls, and one might suspect 
him of being weak. In walking, his shoulders seem to be rigidly 
attached to his body, but as he warms up the legs move more 
freely and his actions become less limited; but immediately on 
cooling off, and especially the day following one of hard work, 
all the symptoms reappear, with even aggravated intensity. The 
disease increases steadily with the lapse of time. When one, or 
what is more rarely the case, both hind feet are affected (Loiset 
has seen it occur), the animal is stiff behind; he is lame on one 
or both feet; he puts his foot on the toe only; knuckles at the 
fetlock; and presently an atrophy of the muscles of the superior 
regions takes place. 
If- — Progress, Duration , Termination . —The disease generally 
maintains a steady progress ; nevertheless it very often undergoes 
a remission, due to the hygienic conditions in which the animal is 
placed ; to the seasons ; to the state of the atmosphere, and to 
other causes. It may diminish in severity, and its symptoms dis¬ 
appear, while in its first period, if the animals are left at rest — 
without shoes if possible—loose in a box, with damp bedding, or 
in a marshy field ; or in winter, during the rainy season, while 
the atmosphere continues in a moist condition for a long period. 
It is, under these circumstances, not uncommon to see feet which 
had become contracted /Quite recover their natural dimensions. 
Aside from these exceptional cases of recovery, the lesion keeps 
on slowly destroying the tissues where it exists ; the lameness re¬ 
mains constant, or becomes intermittent for years, sometimes after 
the animals have become entirely unfit for work. There are fre¬ 
quent complications involving the surrounding parts ; sometimes 
a true arthritis, and besides the complete atrophy of the muscles 
of the shoulder, the carpal ligament becomes thickened, the ten¬ 
don of the perforans undergoes the same alteration, and ring¬ 
bones and side-bones may follow. Again, however, the animal 
may become knuckled to such a degree that he can scarcely rest 
his foot on the ground at all. 
HI .— Pathological Anatomy .— As we have said, the disease 
has its seat in the synovial capsule, formed by the small sesamoid 
