I have two water bowls, one for dogs other for chickens, I've always used extension cords. I do, however, run the lines thru white pvc pipe and secure it to a post or wall. Even tho the lines are circled with metal wire, so to speak, my dogs have been known to pull out nails with their teeth (just kidding, but I take no changes with them). I was just over at Murdoch's and the chicken lady there gave me a great idea. I have had issues with the water getting dirty just about every day. Place a piece of plywood (or anything flat) to cover 3/4 of the bowl, with a rock to weigh it down. This way they can still drink but it keeps the dirt down quite a bit. I'm going to try that today.