SUMMER CARE AND MANAGEMENT. 137 



ty of herbage as is at hand and to change them 

 from one pasture to another about once in ten 

 days or a fortnight. The old adage, "change 

 of pasture makes fat sheep," is true and it 

 depends upon two reasons : change gives chance 

 for fresh herbage to spring up and it gives 

 parasitic germs chance to die before finding 

 again a living place in the body of its former 

 host. It is better then to divide large sheep 

 pastures into several divisions and during 

 warm weather, say from the middle of May 

 till the middle of September, to change the 

 flock from one division to another, letting cat- 

 tle or horses follow them, or letting the pas- 

 tures have rest till the flock comes back again. 



It would not help matters any to keep sheep 

 in each division and change by transposition, 

 a common and sinful practice, as one lot 

 would readily infect another. It is not good 

 management therefore fully to stock a pas- 

 ture with sheep in any part of the United 

 States east of a line running about with the 

 100th meridian, or roughly along the western 

 limit of the corn-belt. The exception to this 

 rule would be in the case of high mountain 

 pastures or in the far north, where the air and 

 soil are cool enough to deter the spread of 

 parasites. 



These stomach worms are not veiy hard to 

 destroy or drive out of the body of the sheep. 

 Tlie writer introduced the gasoline treatment 

 into the United States and it has given excel- 

 lent results in his practice. Coal tar creosote 

 is said to be as good and perhaps Isetter, We 



