10 
Farmers* Bulletin 1181. 
yards and barn lots comi)lete freedom from })arasites is seldom 
obtained. v 
In })asturin<^ ewes and lambs in our experiments of the last two 
years stomach worms have not been found, except in a few^ cases 
in Auijust and September, and these were overcome by giving the 
copi)er-sulphate treatment. In flocks changed to fresh ground eA^er}- 
2 weeks treatment would seldom, if ever, be needed for lambs mar- 
FiG. 5. — Feeding grain to lambs in an inclosure in the field. Lambs have access by 
means of a creep. 
keted in June and July. Temporary pastures on clean land are 
particularly useful for ewe lambs retained as breeders, though treat- 
ment for parasites may sometimes be advisable and may safely be 
used as a j)recautionary measure.^ 
The order in which various crops were used and the length of time 
spent upon each is shown below for the flock containing the young 
lambs and for the lambs alone after the time of weaning. 
* Medicinal treatment for stomach worms is described in Department of Agriculture 
Circular 47. 
