how long between hatching?

[SmilingCinder]

I have a beautiful barred rock hen setting on eggs. I know they aren't all hers, because a few are green (americauna), and out of 14 eggs, 3 have hatched yesterday but nothing today. How long should I wait before all the eggs have hatched? I don't know when the americauna laid her eggs, or when the hen stole them....any ideas on timing?

 

[sumi]

I usually wait 'till 3 days after the chicks started hatching before I move the hen and chicks to the chick pen. Have you got an incubator as back up?