Hi all! Recently, I moved my 6 week old chicks to their coop permanently. They have only been out there for about a week, and there is no way to run electricity to the coop. Currently, the temperatures fluctuate between the 60s and 40s and they seem to be doing great. However, Friday it is supposed to get into the low 30s. Should I bring them back inside that night, move them to the barn instead of the coop, or should they be okay? They are all fully feathered except for a few little tufts of fuzz on top of one's head. Picture attached is of them the first day in the coop.