Prolonged internal pip?

[Fleecy718]

I have some Rouen babies that are due to hatch today. They started an internal pip yesterday early morning. How long should they be in the internal pip phase before externally pipping?

 

[Amiga]

I have read it can take several hours, but that's all I remember. How are they doing now?

 

[Fleecy718]

One has hatched, the other didn't make it. ):