8 August, J907.] 



Lanu'f/ess in Horses. 



477 



When the friction is very great it may give rise to actual inflammation 

 of the joint, in which case the lameness is intense ; the chief symptom beirtg 

 a stiffness or lack of bending of the hock during progression. In most 

 cases however the lameness is not very marked, and oftentimes there may 

 be a permanent distension of considerable size without any lameness being 

 iihown. In the latter case it is sometimes held that the disease should 

 not be regarded as an unsoundness, but where the swelling is distinct and 

 apparentlv permanent or where the slightest stiffness or lameness accom- 

 panies the swelling, there can be no doubt on the point. Bog spavin, 

 thoroughpin, and windgalls are often associated in the same animal, and the 

 tendencv to the development of these synovial distensions is undoubtedly 

 transmitted hereditarilv. 



Bo:4 >iKoin lul^in.:; oxteiiially. 



Fig. 84. Distension on outer aspect of liock from bog s{)avin when jiressure is 

 applied from inside. 



Treatment. — When well established it is not practicable to perma- 

 nently remove a bog spavin. In the early stages, and when lameness exists, 

 most benefit results from the giving of complete rest. To insure this a 

 blister may be applied, but the permanent value of blistering is very 

 questionable. 



Direct pressure from a padded bandage would be advantageous if it 

 could be continuously applied, but it is next to impossible to apply a 

 bandage to the hock in such a manner that it will be retained in position 

 for any appreciable length of time. Temporary reduction of the swefling 

 may be effected by drawing off the fluid by means of an aspirator, but 

 as it is likely to collect again in a short time the treatment is not often 

 followed. Besides, unless the operation is very skilfully performed 

 under completely a-septic conditions there is verv grave risk of an open- 

 joint resulting. 



{To be coiifiiuicd.) 



