| Symptoms | Possible cause |
| |
Eggs candling clear No blood rings or embryo growth. | - Eggs from a flock having no roosters.
- Poor flock management.
- Eggs stored below 40° F or which were too old before setting.
|
Eggs candling clear But showing blood or very small embryos on breaking. | - Incubator temperature too high.
- Eggs stored below 40 or above 80° F. before setting.
|
Dead Embryos Before hatching time. | - Eggs haven't been turned at least 3 times a day.
- Lack of ventilation.
- Incubator temperature set too high or too low.
- Breeder flock having poor hatchability or fed inadequate ration.
|
Eggs pipped but not hatched (Chick pecks hole through shell) Chicks dead in shells.
Sticky chicks Shells sticking to chicks. | - Low average humidity.
- Low average temperature.
- Low humidity at hatching time.
- Excessive high temperature for short period.
|
Hatching too early With bloody navels. | - Temperature too high.
|
Delayed hatch Eggs not pipping until 21st day or later. | - Temperature too low.
|
Draggy hatch Some chicks hatch early, but hatch is slow in finishing. | - Temperature too high.
|
| Crippled chicks | - Abnormalities in development.
- Poor nutrition of hens.
- Incubator temperature too high.
|