They've been in the coop since they were 2 weeks old and they spent their first night without the lamp (at almost 6 week old) last night because it's been so hot and humid here. However, it's supposed to go down to 60 tonight and I'm wondering if this is ok. They seem to be pretty feathered out, but this is my first time owning chickens and I don't really know what fully-feathered looks like. My instincts tell me they are fine but just want some of you to tell me it's ok...(or not) Thank you!