276 THE HORSE IN SERVICE 



prevents the compression of the larynx and the interference with 

 breathing, which come from sharp flexion of the neck under a 

 pulL The overdraw check rein accompanies the snaifle bit, 

 never the curb. Tlie rein should not be attached to the snaffle 

 bit itself, as its bearing will displace the bit in the horse's 

 mouth, thereby destroying its relation with the structures on 

 which it is supposed tO' bear. 



This rein is used on speed and road horses which are not 

 reined up long periods at a time and are driven at a pace, at 

 which they go against the bit in such a way as to put the head 



Fig. 146. — The aide check or bearing rein with bridoon bit. 



and neck in a |iosition in which the bearing of the check rein is 

 very much relieved. The check bit may even be dropped eom- 

 jjletely out of the mouth, although the rein seemed tight when 

 the horse was standing. 



They are out of place on the horse which is required either 

 to do continuous road work, to pull any load, especially up hill, 

 or to stand hitched for any length of time. Ignorant or thought- 

 less use of the overdraw check is one of the most common and 

 severe abuses which horses have to endure. 



The side or bearing rein is attached either directly to the 



