The max and the hatch!

[chicken500]

What is the max amount of eggs a broody hen can have under her?
What is the max you have had under a hen and how many chicks from that batch hatched?
I have 18 eggs under my standard hen and I want to see if they can all hatch.
She has the following eggs under her.
3-large eggs
6-banty
9-standard
So do you guys and gals think they all have a chance?

 

[aberfitch]

not all will hatch. over 12 of her sized egg is pushing it. unless you have a well insulated nest, as well as being deep, that will raise the hatch rate.

 

[chicken500]

The nest is deep and all the eggs fit under her very well.