HEEP PROBABLY SUFFER more from parasites 
than do any other kind of livestock. 
Most of our loss in sheep, mutton, and wool is from 
animal parasites, as sheep suffer comparatively little 
from bacterial diseases. 
Lambs and young animals are most susceptible to 
parasites and suffer most from them. 
It is the sheepman’s business to prevent disease. 
When disease is present it is advisable to call in a 
competent veterinarian. 
Pasture rotation, use of forage crops, feeding from 
racks or bare floors, draining or filling swamps, and 
restraint of wandering dogs are measures of value 
in parasite control Permanent pastures perpetuate 
parasites! 3 
Parasite eggs pass in the manure, usually. The 
disposal of the manure determines the fate of these 
eggs. 
Parasitized animals usually do not have fever; 
they are unthrifty. This unthriftiness may have a 
fatal termination. 
Act promptly to ascertain the trouble when sheep 
become unthrifty. A post-mortem examination of 
one of the sick animals may disclose the trouble and 
save the others. 
Contribution from the Bureau of Animal Industry 
JOHN R. MOHLER, Chief 
Washington, D.C. December, 1920 
