STUD BOOK. 128 



equally class under the name of spavin; but, com- 

 monly, the disease commences on the precise spot that 

 has been described. 



Symptoms. — ^While spavin is forming there is gene- 

 rally lameness, and sometimes very great, but not 

 entirely to unfit him for work. The lameness 

 sometimes abates and entirely disappears, by a little 

 exercise ; but when the membrane of the bone has 

 accommodated itself to the tumor that extended it, 

 lameness subsides or disappears, or depends upon the 

 degree which the bony deposit interfered with the 

 motion of the joint. Sometimes there is no tumor; 

 then, if a sort of regular lameness has existed for some 

 months, referable to no other joint than the hock, and 

 the difficulty has of late gradually increased, so that 

 the joint appears stiff, the critter is there, after which 

 we may expect to observe a tumor on the inside of 

 the hock. A tumor once formed in the region already 

 referred to needs no tvise man to point it out ; it can 

 be both seen and felt; and this, accompanied with 



