108 THE IMPROVED ART OF FARRIERY. 



to give the animal Roaring. The collar invented by 

 Mr. Yare, will prevent Crib-biting, and may be used 

 with greater safety. Animals afflicted with this dis- 

 order are seldom fleshy, and once acquired, is not easily 

 got rid of, even when the cause is removed. 



LOCKED JAW, 



So called from the rigid closure of the mouth, is one 

 of the most terrible and fatal diseases to which the 

 horse is subject. It is evidently an affection of the 

 nervous system, very slow and treacherous in its 

 attack, as sometimes the attack does not come on till 

 the wound, whence it generally originates, is nearly 

 healed. 



Causes. — A wound in the foot, when the nail has 

 been driven into the quick in shoeing, will produce 

 this disease. Nicking, docking, and castration, when 

 unskilfully performed, are all incentives to it. Ex- 

 posure to excessive cold, lacerations and contusions, 

 have brought it on. Gibson has traced its origin to 

 worms ; and more particularly to the erosion of hots 

 on the villous portion of the stomach. 



Symptoms. — A slight fever is generally the fore- 

 runner of this disease; and as it advances, the muscles 

 of the trunk and extremities are drawn up. The head 

 is raised, and appears fixed ; the ears are stuck for- 

 ward; the nostrils unnaturally expanded; the eye drawn 

 into the socket ; and the neck is stiff. The legs are 

 straddled, and the tail cocked and quivering; and 



