I bought two dog bowls from this site. I use one in my chicken coop and it works wonderfully. With the temps in the single digits, their water has always been liquid. It makes it very easy to use. I go out every morning with a gallon water jug and paper towel. I pour the dirty water into a 5 gallon home depot barrel and then wipe the inside with a paper towel. Then refill with fresh water and I am done. This has worked out perfectly.