CRIB-BITINa. 



561 



facilitate cribbing as the principal causes. Mr. Crowhurst, 

 F.R.C.V.S. ("Vet. Record," 25th Jan., 1902), takes the same view, 

 and states that he has never seen cart horses crib, and that their 

 immunity is due to the fact that these animals are always given 

 bulky food. Farges has shown that heredity, especially on the 



Fig. 149. — Perpendicular view of tables of the incisor teeth of a crib- 

 biter (same as Figs. 147 and 148). 



paternal side, is a frequent cause of this vice. All experienced 

 horsemen are aware that it is often acquired by imitation, which 

 fact, as pointed out by Farges, is true only as regards young horses. 

 It is possible that irritation from teething or worms may induce it. 



EFFECT ON HEALTH. — The practice of this vice gives rise to 

 various diseased conditions of the alimentary canal, such as : dila- 



36 



