I 



I 



SOUND AND UNSOUND HORSES 



or " permanent," curable or incurable. 

 In most instances it appears as a per- 

 manent and incurable state. On this 

 account it behoves the veterinary sur- 

 geon to watch against passing a "roarer" 

 or whistler for a client ; yet any 

 examiner might do so, without any 

 blame being attachable to him. 

 Degenerative changes of larynx muscles 

 are, doubtless, the most frequent causes 

 of roaring, or whistling, but abnormal 

 growths and swellings in the region of 

 the larynx and certain specific agents, 

 are also known to be causes. 



Intermittent roaring has been found 

 to arise through the alteration in the 

 position of a pedunculated growth. In 

 this way one might easily pass a horse 

 as sound in his wind, whereas almost 

 immediately afterwards he might be 

 making — and so might the buyer — a 

 noise. 



It is well — for veterinar}' surgeons at 



136 



