Here's one for you, I live in north central Vermont, we have had quite a few nights below freezing already this fall (It's hard to believe it isn't winter yet). Their water bowl in the pen has had a 1/4 inch of ice on it many mornings. I figured I would be a nice guy and bring out a half gallon of warm water to get them warmed up a little in the morning when I go out to let them out of the coop. We all walk over to the water bowl, I tip it over to get the ice and cold water out and pour in the nice warm water (not so hot it will burn them, probably 90 or 95 degrees, I expect to see them all geting a nice warm drink but instead I hear that tell tale clickity click click click of then trying to break something in their beaks to make it bite size and I realize they are playing with the ice chips from their water bowl. This has happened every cold morning for the last week. By the way, it is only about 35 degrees in the coop so they aren't trying to cool off. I just shake my head, throw down some scratch and head back to the people coop for a nice warm cup of coffee.