CHAPTER VI. 



PREVENTION AND TREATMENT OF 

 PARASITES. 



The flockmaster has little work with his sheep 

 in the summer when they are on pasture, aside 

 from keeping them free from parasites. These in- 

 sects have caused the loss of thousands of lambs 

 and sheep and have, in some cases, discouraged the 

 flockowners so thoroughly that they have dropped 

 out of the sheep business. Among these parasites 

 the stomach worm is perhaps the one that has 

 done the most damage to sheep husbandry. On 

 land where rotation of crops is not practiced and 

 old meadow pastures that cannot be tilled are used 

 continuously during many years for pasturing 

 sheep, the infection with parasites is much greater 

 than on land where the rotation plan is followed 

 and sheep are changed to new, fresh ground each 

 year. The danger of stomach worms is not 

 nearly so great in winter as in summer, and the 

 months of July, August, and September are the 

 most serious times for the flockowner. The writer 

 has known, nevertheless, of a few instances where 

 sheep have died in winter and early spring from 

 infection with these pests. 



(105) 



