Reasons For Pipped Eggs But Chicks Not Hatched

Eggs in an incubator can sometimes be pipped (cracked) but the chicks do not hatch out. Possible reasons for this may include;

  • Thin shelled eggs.
  • Improper storage of eggs – which may cause malpositioned embryos.
  • Eggs not turned in first two weeks. 
  • Temperature incorrect – too low for start of incubation and too high prior to hatching time.
  • Humidity incorrect – too high for the start of incubation and too low prior to hatching.
  • Insufficient moisture.
  • Improper ventilation.
  • Infection or disease.

Here are some handy tips to help prevent pipped eggs not hatching;

  • Choose incubation eggs carefully.
  • Avoid incubating eggs that have thin shelled eggs.
  • If keeping eggs prior to incubation then store in the correct conditions.
  • Turn eggs regularly prior to and during incubation (no egg turning in final three days of incubation).
  • Make sure eggs are stored and placed in the incubator with the small end facing down.
  • Regularly check the temperature in the incubator.
  • Try to maintain the correct temperature in the incubator at all times.
  • Regularly check the humidity in the incubator.
  • Try to maintain the correct humidity levels in the incubator at all time.
  • Note that the required temperature and humidity levels are not the same throughout the whole of the incubation period.
  • A wet bulb thermometer maybe a good purchase to help accurately measure the humidity and temperature levels in the incubator.
  • Check that the incubator is working correctly and has a constant temperature throughout the whole of the incubator.
  • Make sure that there is ventilation in the incubator and incubation room, but avoiding drafts.
  • Check breeding stock are healthy and free of infection and disease.
  • Ensure that the incubator is thoroughly cleaned and disinfected prior to use.