How to tell if a chicken will sit

[XoPandora]

You have to remove eggs until zero are peeking out from under the hen. If one or two eggs won't fit, likely none will hatch because as she turns eggs, they get moved around. Any not completely under her will fail due to extended cooling. During the three weeks, all eggs will likely spend time out from under her.
Same thing happened to me a couple weeks ago.

She has none sticking out we made sure of that!

 

[ChickenCanoe]

 

[XoPandora]

Update! She has 8 little ones now!