External and Internal Parasites of Animals. 249 



no ill effects are noticed, but if many, the horse is un- 

 thrifty, suffers from indigestion and may die from their 

 effects on the stomach walls; they are fastened on the 

 stomach walls very firmly and it is doubtful whether 

 medicines have much effect, turpentine two ounces in 

 one and one half pints of new milk three mornings .in 

 succession, given on an empty stomach, will probably be 

 as effectual as any drug. Copperas powders, owing to 

 their tonic and astringent effect on the mucous mem- 

 branes will also be beneficial; tartar emetic two drams 

 in the food daily for two weeks might be used in place 

 of the drench. 



Pin worms are small thin whip-like worms one to one 

 and a half inches long, found in the posterior bowel 

 (rectum), while producing little disturbance of the gen- 

 eral health, they manifest themselves as a rule by a yel- 

 low waxy matter around the anus and by rubbing of the 

 tail and hind parts, the worms may also be found in or 

 passed with the excrement. The treatment is mainly 

 local, by means of injections, first give an injection to 

 clean out the bowel, and follow it with one of salt and 

 water, one ounce of salt to one-half gallon of water; or a 

 decoction of quassia chips may be used, if the injections 

 fail to remove them, internal treatment will be needed. 



Round worms are the larger kind usually found in 

 horses, and when full grown are six to fourteen inches in 

 length; they usually inhabit the small intestines; when 

 many are present the animal loses condition, gets pot- 

 bellied, has a rough coat, capricious appetite, shows a 

 tendency to eat dirt, with occasionally a colic or diarr- 

 hea, and presence of worms in the dung. The riddance 



