Its been so cold this past several days that the water has a thin ice layer on it within a couple of hours of me putting it out. My birds free-range, but they also have a coop they can go in for warmth. I've got a feeder hanging in there, and had a waterer too, but its frozen solid. So, its got me thinking about buying a heated dog water dish for them. I've got a plug right next to the house (their coop is on the other side of the yard). Will my girls be dumb enough to peck at the metal heat cable? I've got one girl who loves anything white & pecks at whatever she sees that's white. I work 8 hrs a day away from home, so I leave before they get up & come back right before they go to bed (now that the days are short) and I want to make sure that with these single-digit temps that they've got water, but I don't want to fry one of my birds. Has anybody had any problems with these kinds of water dishes?