In my limited past experience with this she will not leave the eggs. I had a broody setting on some "fertile eggs " I bought and out of 16 nothing happened, her previous brood was fine. Yes it can take longer than 21 days, I have had late eggs hatch on day 24.Question... I have a bantam Cochin hen that's been sitting on two eggs since may 28th ish. I think today is the 21st day and keep crossing my fingers ill check on her and she'll have two baby chicks hatching.
My question is, if they're duds will she naturally get off the eggs after a certain amount of time goes by?
Does it take longer than 21days for eggs to hatch?