Do mama hens know?

Eddy Chicken

Songster
8 Years
Oct 23, 2011
148
26
141
Southern New Jersey
I gave my hen 7 eggs that I assumed were fertile since we have a rooster.
Two of the eggs got destroyed and they were both duds.
The other 5 have all hatched.
Do you think the hen knows which ones are duds and which are good after a certain period of time?
 

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