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PROBLEM POSSIBLE CAUSE SUGGESTION
Chicks with malformed lower
limbs
Incorrect temperatures and
humidity during incubation
Select more carefully the eggs to
incubate and if necessary check
and correct the operation of the
incubator
Chicks that die before piercing the
egg
Eggs not turned or turned
insufciently during incubation
Select more carefully the eggs to
incubate and if necessary check
and correct the operation of the
incubator
Eggs with a too thin shell
Temperature errors during
incubation
Too high temperature during
hatching
Too high or too low humidity
during hatching
Chicks that hatch early
Small eggs Select with care the eggs to be
incubated, check and correct
the operation of the incubator
especially during the rst 15 days
Too high temperature
Too low humidity
Pierced eggs but dead chick
Too low humidity or temperature Select more carefully the eggs to
incubate and if necessary check
and correct the operation of the
incubator
Preheating too short
Early hatching and unlively chicks
with poor immune defences
Delayed egg collection or the
egg remained for a few hours at
a temperature between 19-25°C.
These subjects are more receptive
to the countless bacterial and viral
infections, present everywhere
Check the management of the
parents, if necessary
check and correct the operation
of the incubator
High incubator temperature
Deformed chicks
Wrong temperature Select more carefully the eggs to
incubate and if necessary check
and correct the operation of the
incubator
Check for hatching egg trays
Errors in egg turning
Small chicks
Too small eggs
Select with care the eggs to be
incubated, check and correct
the operation of the incubator
especially during the rst 15 days
Excessively hot incubated eggs
Insufcient humidity
High incubation temperature
Chicks with too little feathers
High temperature Select more carefully the eggs to
incubate and if necessary check
and correct the operation of the
incubator
Insufcient humidity
Flaccid and wet chicks
Too low temperature Select more carefully the eggs to
incubate and if necessary check
and correct the operation of the
incubator
Excessive humidity
Poor ventilation
Chick attached to the shell and
dehydrated
Insufcient egg turning
Select more carefully the eggs to
incubate and if necessary check
and correct the operation of the
incubator
Wrong temperature
Excessive evaporation of eggs
Too low humidity during hatching
Wheezing chicks
Humidity at hatching too high or
too low
Select more carefully the eggs to
incubate and if necessary check
and correct the operation of the
incubator
Badly healed navel
Excessive humidity during
hatching
Select more carefully the eggs to
incubate and if necessary check
and correct the operation of the
incubator
High incubation temperature
Weak chicks High incubation temperature
Dried chicks High incubation temperature
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