I have a lavender pekin who is 6 weeks old and 2 cream legbars that are 5 weeks old, they have been in there outside coop for 4 days, my problem is the temperature ie gona drop to 0c tonight, so should I bring them in or will they be ok? I have no way to provide heat to the coop, and it has been wet and coof for 3 days and they seem to be doing ok, but worried if it is gona hit zero