108 SOUNDNESS IN HOESES. 



from cribbing, wear their teeth, to some extent, like 

 animals possessed of that vice. 



The chief varieties of wear of the teeth from cribbing 

 are as follows : — 



1. Bevelling of the anterior edges of the incisors, 

 varieties of which may be seen in Fig. 27. Here 

 the wear is chiefly confined to the front and middle 

 teeth. 



2. Bevelling of the posterior edges of the incisors. 

 See A, B, and C, Fig. 28. 



3. Bevelling of the anterior and, at the same time, of 

 the posterior edges of the incisors. See D, Fig. 28, and 

 A, Fig. 29. 



4. Wear, causing shortening, without bevelling, of the 

 incisors. Those of one, or other, or of both jaws may be 

 affected. See B, C, and D, Fig. 29. As a great rule, in 

 these cases, only the front and middle incisors are worn. 

 Hence, the observer may readily recognise the irregularity, 

 by noting that these teeth are not on a level with the 

 corner ones, when both jaws are brought together and a 

 front view taken. 



5. Vertical grooving of the incisors. See Fig. 30. 

 This wear is generally effected by friction against the 

 rack chain. When the horse wears a groove between 

 one pair of incisors, so deep as to hurt his gum, in the 

 event of his practising his favourite vice in it, he tries 

 another pair of incisors ; and so on. 



I 



