I put my chicks out in the coop for the first time tonight. They are almost four weeks old and have a large amount of feathering. I'm just worried that it might be too cold for them, it's 74 degrees right now and tonight's low is 62... what do you think? My other question is, they're all huddled in the run, they don't seem to know how to use the ladder to get up to the nest boxes... how do I train them, or will they figure it out? Thanks in advance!