I have 3 older hens but I don’t think all 3 of them are broody. It’s there a way my buff Orpington can rear in the chicks? Anyways, I’m not taking that chance of my chicks getting killed by the older hens.
No. Unless a hen is actively broody and trying to hatch eggs, she will not accept and raise chicks. Best case she would ignore them and leave them to freeze and starve to death. Worst case she would outright kill them.