This past weekend, my fourth bantam mixed-breed hen went broody.
Three days ago I had 10 chicks hatch under a different broody bantam. They were both bantams and large fowl chicks, but every last one of them hatched.
Yesterday they left the nest for the first time. No big deal. Except they took to EVERY OTHER HEN that was sitting on eggs when they left the original nest. I went out today and all four hens had chicks - INCLUDING the one that just went broody this past weekend. Of course, most of their eggs aren't due to hatch for a little while. But all four of these hens accepted the chicks climbing on them, and one of them even allowed a chick to peck her EYEBALL several times before simply turning her head from him. They never pecked on them, they never attacked them, or pushed them out.
Also today, the second hen that went broody had three of her own hatch. She hasn't left the nest, but the slightly-older chicks have been climbing all over her anyway. But she hasn't done anything to them - even to protect her own new-hatches. She just lets them run and play all in her nest with no problems.
It's like hen day-care over there. They are all caring for whoever wanders into their nest!