Hi All, I have 6 week old chicks and I am wondering if it's too early to leave them outside in coop for the night? they are all fully feathered except for my Brahma (not sure why she is slow to get feathers) and the temps will be in the low to mid 40's during the night and the '70s during the day. I have 2 orpingtons, 1 jersey giant, 1 silkie, 1 brahma, and 2 ameracauna. If it's too early, when should I wait until? thanks!