140 
ELEMENTARY AGRICULTURE 
to separate them from the healthy birds. Clean up the 
premises and disinfect the yards, houses, and feeding 
equipment with some good disinfectant. Sterilize the 
drinking fountains and give each adult bird one half tea¬ 
spoonful of salts in the drinking water. Put one tea- 
spoonful of carbolic acid in one gallon of water and place 
it where the birds will be forced to drink it. Feed and 
treat the sick fowls at some time other than when you 
are caring for the healthy birds. 
Fig. 109.—A chicken with the roup. 
Culling Poultry.—Culling is an effort to reduce the 
number of mongrels and non-profitable fowls on 
American farms. Many chickens and other kinds of 
poultry will not pay for their keep, it should be the 
business of every good poultry keeper to improve his 
flock for higher egg yield and better meat production. 
Time to Cull and Problems Involved.—The best 
time to cull is during the months of July and August. 
Some of the phases of culling are as follows; 
