240 BOG-SPAVJN. 



Description and Symptoms of the Bog-Spavin. 

 BOG-SPAVIN. 



This is generally (though falsely) called a 

 blood-spavin-: it is a tumor which makes its ap- 

 pearance on the inside of the hough, and gives 

 way to the pressure of the finger, but recovers its 

 shape on the removal of the latter. The bog- 

 «{>avin arises from a strain in the hock-joint, oc- 

 casioned by hard riding, drawing, leaping, &c. 

 Sometimes young horses will strain themselves by 

 galloping about, when in their pastures ; by which 

 the capsular ligament that surrounds the joint is 

 'divided, and the synovia discharges itself into the 

 hend of the hock, where it is retained in a bag, 

 •or cyst. In this complaint the horse goes stiff, or 

 lame, in the joint, when first contracted. It is 

 always attended witli inflammation more or less, 

 %hich may be felt by applying the hand to the 

 part. Sometimes it is so considerable as to ex* 

 'tend all round the hock-joint, with violent pain 

 and swelling : in this case it must be fomented 

 with (No. 123, p. 184), and the mixed oils (No. 

 120, p. 180) be rubbed on immediately after^. 



