5 days to hatch day

[Hopeful homesteader]

I've got 10 chicken eggs under a broody due to hatch on the 19th. I've read they can hatch early under a hen and in warmer temperatures. Today we've reached 101° and it's been in the 90's since they started sitting on them. With these conditions, how early could they hatch?

Also with pipping and zipping, will I only hear chicks chirping after they've pipped? How long after pipping with they zip and come out of the shell?

 

[Lemon-Drop]

I've got 10 chicken eggs under a broody due to hatch on the 19th. I've read they can hatch early under a hen and in warmer temperatures. Today we've reached 101° and it's been in the 90's since they started sitting on them. With these conditions, how early could they hatch?

I’m not entirely sure, maybe a few days early at most.

Also with pipping and zipping, will I only hear chicks chirping after they've pipped?

Once they start breathing in the internal pip, they’ll start cheeping. Not before that, though.

How long after pipping with they zip and come out of the shell?

Internal or external? Up to 24 hours for an external pip, or 48 hours for an internal pip.