- May 20, 2015
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It depends on how far along they are. Try looking at this.
https://www.backyardchickens.com/articles/development-of-a-chicken-embryo-day-by-day.72537/
That page is funny. It describes in detail what is supposedly happening (like toes developing, etc), but I can't see any of it. All I can see is a dark spot.