Mine are learning that lesson, too. lol "Rooster Cogburn" (so named by dh) was the original mean one. He would (and still sometimes) walk by a hen nonchalantly, and then quick turn and mount her, totally catching her offguard. It was hysterical to watch! We have Canandaigua Wine in town, and they give away large plastic 50 gallon pails. You could just about make a hot tub out of one of these. They are a good half inch thick. It's been perfect. I think they are used to haul the grapes. I have only seen one mouse before. I'm sure there's probably been more than that but the chickens must take care of them PDQ. My hen with the wounded back is doing beautifully. But now since she's been in the heated garage, I'll have to wait until probably Monday to put her back out with her friends. Too much of a shock going from 75 to 5, huh?