My girls use a nipple waterer since it really cuts down on the mess. With a regular waterer they were always getting sand in it, no matter how high up off the ground I put it. But the problem with the nipple waterer is that it constantly freezes overnight. I don't mind thawing it out every morning, but what can I do when we go out of town for a couple of days for the holidays? I don't have electricity available in the coop. Any ideas would be greatly appreciated!