I've been thinking about this myself lately. I'm in the midst of looking for plans to build a coop. It will be set back a good distance from the house, and running electricity underground sounds like a big on-taking. Although, I'm not sure how safe running a lead cord all the way to the coop is, and would be weary of it laying covered by snow for months. I'm considering buying a solar panel and connect a light or heat lamp to it for their water. I work from home, so going out there twice a day to change their water wouldn't be a problem. Does anyone here recommend going solar? Thanks for your help.