I have 6 chicks that are 4 weeks old. It seems like they have most of their feathers with some fluff still poking out but not a lot. They are outside now and it is about 58 degrees. They are not shivering but it will drop down to 45 tonight. They will be in a coop that is draft free. I was just wondering if it is okay for them to be in their coop over night. Any help is appreciated, thanks!