I know a lot of folks do this but I personally don't see the benefit. A good hen will give chicks much better, more attentive care than any box & heat lamp will. She can keep them protected & warm, and teach them lots of skills. You can still socalize them by bringing the hen treats that she will teach her chicks to enjoy. Most hens are ready to leave their chicks after 4-8 weeks and you'll still have lots of time to get them used to your handling then.