Broody Hen, how many eggs is ideal?

[Spartan22]

i got a Black Australorps that went broody couple of days ago, I gave her 6 fertile eggs yesterday and added 3 more today - total of 9. Can she hatched/sit on a dozen eggs comfortably or some of the eggs will not be properly covered? First time hatching with a broody hen.

 

[redranger209]

The general rule is 12 of her own size egg. Australorps are large, so she should be ok.

 

[sylviethecochin]

x2

Also, it really helps her cover the eggs if you the nest is well-constructed. Think "bowl" more than "plate." Some new mothers aren't great at making nests.