EXOSTOSIS, 471 
‘The removal of the lameness is obtained in the. greater half and even two-| 
thirds of cases. 
When osteo-arthritis of the hock is considered the cause of a recent lame- 
ness, when a spavin is suspected, long rest is the primordial indication. 
Even at the outset, it is at least doubtful if long immobilization will succeed 
in obtaining the disappearance of the inflammatory symptoms with which 
the swbastragaian joints are affected, so that everything will return to its 
mormal state. In most of cases, a relative recovery only is obtained— 
Fig. 103.—Spavin. Front view of dis- Fig. ro4.—Vertical transverse section of 
a‘ sected hock. a spavined hock. 
simple or multiple ankylosis, limited or extensive—and all the treatments 
recommended act satisfactorily only in favoring it; existing articular 
lesions, even recent, are incurable. 
By rest and blistering applications (mercurial blister, red ointment, 
‘sublimate ointment 1 to 6) on both faces of the joint, the lameness may 
be made to disappear, when the spavin is tarsal and on the way to 
development ; as soon as the animal is returned to work, the lameness. 
returns. Blistering frictions, even repeated, have a too superficial action ; 
