Do any of you do play pins for your chicks once they get a little older. The tubs my chicks are in are easy to keep warm and more importantly keep the cat out but they arnt that big so I had the bright idea of takeing like 3 or 4 of the large boxes that the eggs came in to make a play pen for them to play in during the day. When we are around and the cat is scarce =P . Does anyone else do this.?