1 Rooster, 9 hens, if I let the hens brood, how many eggs will hatch?

[GimmeCake]

I was wondering if 1 black australorp will make at least most eggs from 9 hens fertilized so they can hatch. Thanks!

 

[gryeyes]

If he's not shooting blanks, probably all of the hens.

I check every egg I eat for the tell-tale "bulls-eye" just to make sure the majority are fertile.