THOROUGH-PIN. 293 



tumour on one side of the limb causes it to disappear on 

 that side, and appear on the other side of the limb. Hence 

 the name ' thorough-pin.' It rarely produces lameness, and 

 as a general thing is not to be considered as a serious 

 condition by any means. 



Treatment. — The treatment of thorough-pin is about the 

 same as that for wind-galls, bog spavin, etc. A thorough- 

 pin truss is easily applied, and should be used, being of 

 great benefit. Hot and cold applications and astringent 

 lotions, the white lotion being one of the best, may be used. 

 Vesication is also frequently beneficial. Cantharides is 

 as good as any counter-irritant in the treatment of thorough- 

 pin ; it may be prepared and applied in the ordinary way 

 and of the usual strength. In the winter time the animal 

 should be turned out. It is wonderful how great benefit 

 cold has on thorough-pin, frequently the animal after running 

 out all winter coming up in the spring with his limbs as clean 

 and free from thorough-pin as ever they were. The various 

 preparations of iodine used externally and administered 

 internally are often useful, as they tend to cause removal of 

 the fluid by the absorptive process. Diuretics may also be 

 tried. Some practitioners recommend removal of the fluid 

 contained within the bursa by the operation of puncturing, 

 and allowing it to escape or be forced out by pressure, after 

 which a truss is applied to prevent further distension. 

 Such a procedure, in my opinion, is not desirable, except in 

 certain rare cases ; and where it is decided to open the 

 bursa and remove the fluid, the aspirator should always be 



used. 



CAPPED HOCK. 



Capped hock consists of a little enlargement appearing 

 on the point of the hock, and is sometimes due to dis- 

 tension of the small bursa situated immediately beneath the 

 skin. In other cases it may be due to distension of the 



