I have 4 6 week old chicks with a broody hen. She's starting to hang around the flock more when out free ranging, but I still keep them separated at night because the chicks easily fall off when trying to roost with the flock. Of course the broody is ready to have them sleeping with the big girls, so should I just let them do it now? All of the hens know to stay clear of the chicks, and the hen still chases everyone off. When will she no longer be "Mom"?