EOAEING— ITS CAUSES. 279 



ROARING. 



Eoaring, like Broken Wind, is not of itself a disease ; it is 

 symtomatic of disease resident within certain of tie respiratory 

 organs and structures. It is not my intention to enter into 

 any very elaborate details witt respect to this peculiarity of a 

 disease. I shall simply consider the most promiaent charac- 

 teristics with regard to it. 



Causes of BoAsiNa. — The causes of Eoaring are naturally 

 divisible into two classes, viz : — remote and proxvmate. The 

 remote causes are those of an hereditary nature, and those 

 which relate to peculiarity of confirmation and to the sex of 

 the animal. It is a well known fact that colts, whose sires 

 were roarers, are frequently affected in a similar manner. Also, 

 that geldings are more frequently affected with Eoaripg than 

 mares ; and that tall, leggy horses, are far more prone to the 

 affection than horses of small but compact stature. 



The proximate causes are numerous. Sometimes Eoaring 

 can be clearly traced to a severe attack of Laryngitis, or an 

 attack of Common Catarrh, or of Strangles ; in other cases it 

 is difficult to assign a direct cause of any kind. To the astonish- 

 ment perhaps of both owner and everyone having to do with 

 the ease, a horse is suddenly discovered to be a roarer, which 

 previously had never been heard to manifest anything of the 

 kind. Horses required for great speed, such as hunters and 

 race horses^ are occasionally found to have become roarers in a 

 very sudden, and seemingly inexplicable manner ; the cause 

 in all probability, however, depending upon a sudden paralysis 

 of one or more of the laryngeal nerves. I knew a case of a 

 post horse that was once, driven as fast as he could be made to 

 gallop for a distance of four miles, and the animal ever after- 



