My 4 soon-to-be 10 weeks old girls have been free ranging in the backyard during the day and coming indoors to their brooder at nite while the coop is being built. The coop is finished!!!!! Pics posted soon. With a cold snap coming.....low 30's at nite, 50's during the day, chance of snow.....are they ready to be out permanently? I don't have any heat source set up but can be easily remedied. Just wondering if 4 dry girls can keep warm enough without extra heat. They will be dry and draft free.