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Candling

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From: Sheri Ferris
City:
Carol Stream, IL
Throughout the 21 days I was able to candle some of the eggs. I noticed that some embryos were smaller than others. As I am getting ready to take the turner out I candled the eggs one more time. I had a few that were no longer viable, a few that were normal sized and looked ready to hatch, and several where the embryos looked about 1/2 the size of the eggs that looked 'normal' but there was movement in the eggs. Will the smaller embryos hatch at 21 days like the normal eggs? How long do I give them if they do not come out after 21 days? What would cause such a difference in size of the embryos? I did have a couple of days where the temp was a little low (trouble with my thermometer). I also had one that got stuck to the turner and I had to break it to get it off (no chick inside-thankfully!)

 
Extension Message
From: Ken Koelkebeck
Extension Specialist, Poultry
Department of Animal Sciences
kkoelkeb@illinois.edu
The smaller embryos will probably not hatch the same time as the larger ones. they just did not develop as fast. Maybe too much temp variation? Give them until 24 or 25 days.

 
From: Sheri Ferris
City:
Carol Stream, IL
Thanks! Do I still need to turn those eggs? I took them off the turner because of the other eggs that seemed ready.

 
Extension Message
From: Ken Koelkebeck
Extension Specialist, Poultry
Department of Animal Sciences
kkoelkeb@illinois.edu
You do not need to turn those eggs if it is past Day 17 or 18.

 
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