They will share responsibility when they hatch.
Dolly has never had her own brood as far as I know. She has a curled foot that wasn't corrected as a chick. She gets around okay, but she can't use ramps. The chicks would definitely get away from her. Henley is a first timer also. She is just 7 months old. I am going to let them hatch in the coop with the flock this time. I usually bring them in the house, but I want to see how they do with the other flock members.It all depends on how well your handicapped Dolly will do in her momma duties. If she's had chicks before she'll do fine as long as she and Henley aren't fighting. I have two Silkies that go broody together in a box but if they actually had eggs one Silkie is too combative to share if there were real eggs under them.