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PROBLEM POSSIBLE CAUSE SUGGESTION
Clear eggs. No blood
vessels are visible
during candling
Eggs not fertilized due to too many, too
few, too old or infertile cocks
Use only young and vigorous cocks,
never consanguineous ones
Blood rings are visible
while candling
Eggs stored for too long before incubation Do not store the eggs for more than 7
days
Too high or too low temperature during
storage
Ensure that the room temperature is
between +14°C and +18°C
Inadequate care of the eggs before
incubation
Check the correct storing of the eggs
Eggs not collected frequently enough Collect the eggs more frequently
during the day
Too big air cell
(excessive weight
loss)
Undersized eggs, too low humidity during
incubation
Follow the instructions under chapter
3, namely about the selection of the
room where to incubate and about the
water basins filling
Too small air cell
(small weight loss)
Oversized eggs, too high humidity during
incubation
Follow the instructions under chapter
3, namely about the selection of the
room where to incubate and about the
water basins filling
Many dead embryos
/
Chicks die before
piercing the shell
Blood-related parent stock The parent stock must not be siblings
Old eggs Store the eggs for max. 7 days
Old parent stock
Parent stock shall not be older than 2-3
years
Semi-automatic incubator: eggs not
sufficiently turned during incubation
Turn the eggs at least 4 times a day
Bacterial contamination Ensure that the eggs are clean
Nutritional deficiencies Feed the parent stock with specific
fodder
Eggs have traveled for long distances Incubate local eggs only
Wrong humidity during incubation Comply with the information given
about the filling up of water basins
The incubator has worked in an
environment too hot
Make sure that the room temperature
is NOT above +26°C
The incubator has been opened too often
during hatching
Open the incubator max. once a day
to remove the dried off chicks
Other causes Follow the instructions on chapters 3
and 4
The eggs fracture Dirty eggs Incubate clean eggs
Chicks with
malformed lower
limbs
Incorrect humidity during incubation
Comply with the instructions on the
quantity of water necessary.
The incubator worked in a room below
+20°C
Make sure the room temperature is at
least +20°C
Blood-related parent stock The parent stock shall not be siblings
8. PROBLEMS THAT MAY ARISE DURING INCUBATION
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