Rough, congested or poorly healed navels.
|Probable Cause||Suggested Corrective Measure|
| High temperature or wide temperature variations.
| Maintain proper temperature levels throughout
incubation and hatching cycle.
| Excessive humidity in hatcher after transfer.
| Use less humidity first 24 to 36 hours after
| Embryos infected prior to transfer or during
|Set only clean, uncracked eggs. Check hatcher sanitation procedures. Make sure hatcher and hatch trays have been thoroughly cleaned, disinfected, after each hatch.|