LOCKJAW 



allows for the turning of the front wheels. It is divided into 

 three distinct degrees, known in the trade as half lock, three- 

 quarter lock, and full lock. The first implies that the wheels 

 will lock only half-way round ; the three-quarter lock, that 

 the wheels will go only three-quarters of the way round ; and 

 in a fall lock the wheels pass right under the body. The 

 degrees of the lock are provided for by a locking-stop welded 

 into the wheel plate. 



Lockjaw may be the result of a chill when heated, a 

 wound, especially in the region of the foot, the presence of 

 worms or bots, or other causes. It is a most serious source 

 of trouble when it appears, as fatal results may always be 

 expected, but it is not infectious, although it can be com- 

 municated from one animal to another by means of any 

 pus which may discharge from a wound, and therefore 

 precautions should be taken to isolate the patient, and to 

 thoroughly disinfect the stable and any utensils he may use, 

 whilst his bedding should be burned. 



Symptoms. — The neck becomes stiff about a fortnight 

 after the source of the trouble, whether it be a chill or 

 an injury, occurs ; then follows a difficulty in eating, this 

 being followed by the locking of the jaws and stiffness of 

 the limbs, the tail very often being carried high. Spasms 

 of the muscles are frequent, the breathing becomes difficult, 

 and the horse breaks out into a sweat. 



Treatment. — As the least excitement is liable to bring 

 on spasms, the patient should be kept as quiet as possible, 

 no one being allowed to come near him unless necessary. 

 Soft-cooked food, such as mashes and green stuff, may be 

 given him, if he can eat it ; if not, he must be drenched 

 with gruel. Let plenty of water be within his reach, and 

 clothe him warmly ; whilst bad cases may be slung in 

 order to avoid injuries when the spasms occur. The pro- 

 fessional attendant will probably prescribe some soothing 

 medicines, but absolute rest and quiet affords the best 

 hope of a recovery. (See Medicines, Slings.) - 



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