Chickassan
RIP 1975-2022
It is an idea born from frustration. It works and chickens look like they're at the disco. 

All broody hens are different. Most bond with their chicks within 24 hours of hatch and regard all others as intruders. Some will accept new chicks for several days. I once had a hen who raised RIR chicks her first clutch. Second brood contained some black chicks. Before I knew what was happening she had killed all of the black chicks - her memory bank only accepted red chicks. @Chickassan, that's a great idea. This old guy learned something today.