My chics (16 BR's) are exactly 1 week old today. So for their birthday I moved them into a bigger brooder and they were going nuts. They were hopping and flying all over the place. It was like a housewarming party. All are doing well. I had to help one with a case of pasty butt a couple days ago but all are doing good. They were in a plastic storage bin but their new house is a giant cardboard box. They love it. Next stop- the coop.