During the day I have been free ranging my youngest pullets with the older ones and everyone is getting along very well. The temperature outside at night is in the mid to lower 60's. The five and six week old are mostly feathered out except their heads. I think they would be OK. The four week old has her wing feathers, tail and the feathers on her body are slowly coming in. I'm wondering if it would be OK to let her stay outside in the coop with the others. Hauling dog crates in and out every day is a pain. I'm leaving to go out of town in a few days and I'd like to make "chicken care" as simple as possible for my DH while I'm gone. Here's a current picture of Black Betty - my sassy Australorp. OH, and is that tail long for a pullet? She is a freak compared to my other stumpy tailed girls. No comb or wattles to speak of yet.