UNSOUNDNESSES, BLEMISHES, AND VICES 



263 



POLL-EVIL 



Poll-evil is a swelling which forms on the top of the neck 

 immediately behind the ears. At first it is hot and painful, 

 later the acute symptoms of inflammation subside. The swell- 

 ing may be on one or both sides and usually contains pus, or a 

 straw-colored fluid, and involves the large mucous bursa situated 



v Fig. 65.^Model showing the location of various unsoundnesses and blemishes: 

 1, Poll-evil; 2, roman hose; 3, pendulous lip; 4, shoe boil; 5, enlarged knee; 6, 

 founder; 7, splint; 8, windgall; 9, fistulous withers; 10, sway back; 11, droop 

 rump; 12, rattail; 13, crooked tail; 14, broken hip; IS, bog spavin; 16, capped hock; 

 17, thoroughpin; 18, curb; 19, cocked ankle; 20, enlarged fetlock. (Model 

 designed by Geo. F. Morris.) 



over the first vertebra. A bruise or other injury is the most 

 frequent cause of poll-evil. External applications of liniments 

 and poultices fail to remedy the condition. Lancing the swelling 

 on each side does not answer, for it is impossible to get complete 

 drainage. Consequently, it will be necessary to have the surgeon 

 incise the enlargement lengthwise and carry the cut over the 



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