When will chicks pip externally

[Eco Homesteading]

It's day 19 or 20 and one of my eggs is chirping and rocking, any ideas when will i get a external pip?

 

[ChickenCanoe]

If internal egg temp has been steady 99.5 throughout incubation, they will hatch at 21 days.

 

[MGG]

It's day 19 or 20 and one of my eggs is chirping and rocking, any ideas when will i get a external pip?

Probably soon, but it varies a lot.

 

[MGG]

Also, welcome to BYC!