Temperature should be 100'F for forced-air incubators and 102'F for
still-air incubators.
Check the temperature by placing the hatching thermometer at the same
height as the top
of the eggs would be. The heat source should be adjusted if needed.
Humidity should be 58-60% from day one to day 18 and should be
increased to 65% from day
18 to day 21. This is important to prevent moisture loss in eggs.
Air vents should be opened slowly as chicks begin hatching for proper
ventilation.
Eggs should ideally be turned four to six times daily, but two or
three times daily will
suffice. Turning an odd number of times per day is best. Turn the eggs
until day 18, and
then do not turn any more -- turning after day 18 could injure the
chick.
Forced-air incubators have automatic turners.
Eggs in still-air incubators must be turned by hand. Use the X and O
marking technique to
help keep the turning correct.
Always make sure hands are clean before handling eggs or chicks.
hatching on day 21