Ended 12th Annual BYC Easter Hatch-Along—Hatching Chick Photo Contest

Pics
Why are there swirls on the eggs
You mean the pencil marks? People do that to keep track of how large the air cell is inside the egg. It tells them if the chick is developing on time and if humidity levels in the incubator are right. You can hold a small flashlight up to one end of an egg to see.
 
hatching.jpg
 

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