FARM ANIMALS 285 



containing a fluid. The pressure on the brain 

 causes a curious and characteristic symptom in 

 the infested sheep. The animal keeps turning 

 around to the right or left according as the parasite 

 is located on the right or left side of the brain. 

 There is obviously no remedy for this disease and 

 prevention is again the only hope of eradicating it. 



The sheep bot fly lays its eggs within the nostrils 

 of the sheep where they develop into maggots and 

 cause serious irritation and worry to the sheep. 

 Some sheep raisers have found considerable success 

 in preventing the fly from laying its eggs by smear- 

 ing the sheep's nose with tar or some other sub- 

 stance of a disagreeable odor. In many cases the 

 maggots may be removed by a direct application of 

 turpentine in the nostril with a feather. 



It is necessary to dip sheep annually and some- 

 times more than once a year not only on account 

 of the sheep scab, but also on account of infesta- 

 tion with the sheep tick. This is a peculiar insect 

 which lives on the skin of the sheep and when 

 occuring in large numbers causes great loss of 

 flesh. It may be destroyed by the same dips which 

 are recommended for sheep scab. The best time 

 to dip sheep for this purpose is immediately after 

 shearing, since at that time the dip readily gets in 

 contact with all the ticks which may be in the short 

 wool. 



