My chicks seem fully feathered and I know the legend is that once they are they can move into the coop, but I have a frizzle and she gets cold because her feathers don't hold in the heat. I was hoping the big hens would help keep them warm but to the little ones think of the hens as an incarnation of terror itself, so there is no chance of that. Should I put them out and hope that the other two normal chicks keep the frizzle warm? Or should I not risk it? My chicks are getting to big to be in a cardboard box with a heat lamp, but i don't want to put a heat lamp in the coop with the chickens, for fear of the old hens over heating.