How many eggs fit under Orp hen?

[PaintedMeadows]

We have a broody orpington hen and we want to put some eggs under her. Last year we only put 9 under her and she stole 3 more. How many can we put under her? She is a good momma so we want to her to hatch as many as she can. Thanks in advance. I did some research but couldn't find this answer anywhere on the site.

 

[Buff Hooligans]

I'd say keep stuffing until you start to see white/brown around her edges.

 

[PaintedMeadows]

lol. OK thanks. I am getting a dozen cuckoo maran eggs on the weekend plus we want to put some of our orp eggs and some ee eggs under her too. I wish another one of our hens would go broody too but no luck yet. Can you make them go broody?