209 



be completely attained. If a farm is completely free from it in the first 

 place, then prevention simply lies in not allowing infected sheep to be 

 brought on the premises. All purchases of sheep should be from flocks 

 which have shown no signs of the disease in preceding years. Brooks 

 which run from pasture to pasture oii'er a chance of infection where the 

 neighbors' flocks upstream are infected. Strange sheep should not be 

 pastured unless they are known to be free from parasites. Feeding 

 and care to keep up the general health are essential. Careful separa- 

 tion of affected animals should be practiced, and the worst diseased 

 ones may be slaughtered. Treatment should not be neglected. During 

 treatment it is best to keep the sheep up, and after the course of treat- 

 ment is concluded they should be turned into new pastures. 

 23038 A p U 



