Okay, actually this is my first winter ever with chickens anywhere. As a retirement gift, I was given a double walled fount type waterer, and it has worked well throughout the summer. Someone else gave me a base water heater for it. The price has sure been right so far! I'll use it for awhile, but I have my doubts on how long it will last because I'm going to put it outside on a concrete pad in the chicken run. Coop floor space is too precious, and I hate the idea of water spilling and getting the coop wet. It gets cold here in the central Idaho mountains. Ten or Twenty below is not that uncommon for a week or so with a couple of feet of snow on the ground for several months. I need your suggestions for a waterer that can withstand the elements this winter. I do have electricity to the open run for my eight spoiled chickens. Thank you in advance for all your help.