BOG SPAVIN. 



325 



and bandaging with cotton wadding will be the best treatment 

 at first. The affection (splints or sprain for instance) which 

 gives rise to the windgall, should be specially treated. 



Bog Spavin 



appears as a soft swelling to the front and to the inner side of 

 the hock joint. Its position, which is indicated by a dotted line 

 in Fig. 128, is higher up than the seat of bone spavin. A corn- 



Fig. 129. — Front view of 

 near hock. 



Fig. 130. — Rear view of 

 near hock. 



parison between Figs. 131 and 132 shows the exact spot at which 

 we should look for bog spavin. 



ANATOMY. — This ailment is a distended condition of the synovial mem- 

 brane of the capsular Hgament of the true hock joint— that which is formed 

 by the tibia and astragalus (Fig. 98) — and lies between the base of the astragalus 

 and the internal lateral prominence (the malleolus) of the tibia. "It shows 

 itself at the inner side of the joint, because here the ligaments are wider apart, 

 and there is more room for distension " {8tonehenge). It is soft and elastic, and 

 extends up and down the inner front of the joint for about four inches, or 

 more, as the case may be. 



Bog spavins often exist without any symptom of inflammation. 

 In other cases, the distension is, at first, hard, painful to the 



