INTERFERING. 115 



most important use, is for piercing the rumen of cows and 

 oxen, when attacked with hoven. Second, it is used oc- 

 casionally for piercing the horse, in cases of flatulent co- 

 lic, and in drawing off the fluid or serum, accumulated in 

 the chest from disease of the lungs and pleura. Third, 

 a small size of this instrument, is used in piercing the 

 head of sheep, affected with hydatids. After the trocar 

 has entered the hydatid sack, the trocar is pulled out, the 

 canula remains, the point of a small, and well-packed sy- 

 ringe is placed in the head of the canula, and the suc- 

 tion-force draws the fluid into the syringe, and the small 

 cysts into the canula; so it can be caught, and pulled 

 out by means of a pair of forceps. A trocar and canula 

 should be kept by every farmer who has a cow or an ox. 



Intestines- — Introsusception, or an entangling of the 

 intestines, sometimes takes place in horses, and proves 

 fatal. 



Causes. — Bowels empty, and the horse being driven 

 fast. 



Symptom. — When the horse comes in, he is observed 

 to be uneasy : — lying down, pawing with his feet, follow- 

 ing closely the symptoms of colic. The difficulty, or im- 

 possibility of procuring relief, is only seen on examina- 

 tion, after the horse is dead. (See Bowel Diseases.) 



Itch. — (See Mange and Skin Diseases.) 



Interfering. — This name is in use, when speaking of 

 a horse hitting himself on the inside of the pastern joint, 

 either on the hind or fore leg. Sometimes it is called 

 cutting. It is usually done with the side of the opposite 

 foot. 



Causes. — The blacksmith is many times wrongfully 

 blamed for shoeing the horse, bcause he interferes. There 



