Make Your Own Egg Incubator from a Recycled Water Bottle: A Complete Guide to Hatching Chicken Eggs at Home

Place a thermometer in the center to monitor the temperature, which should remain between  37.5°C and 38°C . Add a small bowl of water to create adequate humidity ( 50-55% for the first 18 days, then 65-70% for hatching ).
Choosing the right eggs: an often overlooked step
A good incubator isn’t everything. Egg quality is essential:
  • They must be fertilized, therefore from  breeding with a rooster .
  • Recent , ideally less than 10 days old.
  • Neither washed nor cracked  : their thin natural film is a barrier against infections.
  • Regularly sized to ensure even development.
Monitoring and maintenance of incubation
Here are some key actions to optimize your chances:
  • Turn the eggs 3 to 5 times a day  to prevent the embryo from sticking to the shell.
  • Monitor temperature and humidity regularly.
  • Stop turning them 3 days before hatching.
  • Avoid opening the incubator during this last phase: this could cause  the temperature or humidity level to drop suddenly .
A little extra tip: perform a  candling  (by placing a lamp behind the egg) around the 7th and 14th day to check the development of the embryo.
D-Day: The long-awaited hatching
Hatching can take time. Don’t worry if a chick takes several hours to emerge.  Don’t help it break the shell!  Every effort is essential for its health.
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