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Quote: ok so no cold spots in the corners or hot in the middle of the bator? Then I will see what those links say too. Also did you hatch your own or local eggs yet? I forget everything I am sorry.
- Sign: Not pipped. Full-term embryo, large yolk sac; yolk sac may not be fully enclosed by abdominal wall, may have residual albumen. Causes:
- Inadequate turning, resulting in decreased embryonic membrane development and nutrient absorption.
- Humidity too high during incubation or after transfer.
- Incubator temperature too low.
- Hatcher temperature too high.
- Eggs chilled (e.g., at transfer).
- Nutritional deficiencies.
- Heredity.
- Embryological development accident.
- Breeder diseases.
- Inadequate ventilation.
- Prolonged egg storage.
- Sign: Pipped. Full-term embryo, dead in shell. Causes:
- Low humidity or temperature for a prolonged period.
- Low humidity during hatching.
- High temperature during hatching.
- Nutritional deficiencies.
- Breeder diseases.
- Poor ventilation.
- Inadequate turning during first 12 days.
- Injury during transfer.
- Prolonged egg storage.
Symptoms Probable Cause Corrective Measures
Pipped eggs, but died without hatching Insufficient moisture Increase humidity (wet-bulb temperature) during the hatching period.
Improper ventilation Increase ventilation rate in incubator and/or room, but avoid drafts.
Improper setting of eggs causing malpositioned embryos Set eggs with small end down. Turn eggs properly but avoid turning within 3 days of hatching.
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