I know that most of you heat your chickens' water during these winter months, and some of you use rabbit or nipple waterers for ease and cleanliness reasons. Does anyone combine the two? In my most recent McMurray catalogue, in the rabbit section, they advertised a heated rabbit waterer. It isn't online, as far as I can see, but I was wondering if anyone else had used this. If it works, great, if not---just another expensive piece of junk.