52 Roaring in Horses. 



while in the Light Cavaby it was 1-91, in Cavahy of the Line 

 2-19, and in the Reserve horses (Heavy Cavahy) 3-87. Though 

 there were more horses unsound from Roaring in the Heavy 

 than the Light Cavalry, which fact might be adduced in 

 favour of the influence of size ; and though the Artillery 

 horses were taller and heavier than those of the Cuirassiers 

 and Dragoons, yet there were far fewer Roarers among them, 

 showing that the defect is much less frequent among com- 

 mon-bred than well-bred horses. 



In a tramcar company in London, with an establishment 

 of about 3,000 horses, which are chiefly light agricultural 

 animals from Wales, Roaring is unknown. 



Therefore size cannot be considered as of great moment, 



in predisposing to the morbid condition which gives rise to 



the defect. 



6. Age. 



Age would appear to exercise a certain amount of in- 

 fluence in the manifestation of Roaring. Apart from 

 toxical production, it is extremely rare in foals, though it 

 has been observed in those of six months old. Reynal, 

 speaking of this defect in French horses, says that with 

 those which do not leave the country in which they are 

 foaled, it appears more frequently between two and four 

 years of age ; and with those which are exported to the 

 great industrial centres, it is not unusual to see it manifest 

 itself at from five to seven years old. 



From two to seven years of age, horses appear to be most 

 predisposed to become Roarers in this country, and the 

 majority probably become unsound from this cause between 

 three and five years. This is more especially the case with 

 well-bred, and particularly racing horses. It has been justly 

 remarked that " not a season passes but some promising 

 animal, having accomplished wonders at two years of age, 

 is good for nothing, or for nothing but short spins, at three, 

 because it has begun to make a noise, and goes on from bad 

 to worse." 



