My neighbor has a dog. It lives outside 100% of the time. The old dog house had more entrances and exits than a civ. I took it upon myself to build an insulated dog house for the animal. The water dish froze every year, so I bought the animal a heated water bowl. If temperature of the water dropped below 40˚F the heat would come on and warm the water so it wasn't frozen. Seems I care more for my neighbor's dog than my neighbor does. I considered putting a small lamp in the dog house. Any source of warmth is better than absolutely nothing. The lamp is never turned on because it's "Too Expensive".Sometimes things like heating pads are just easier bought than put together from pieces and parts. A Google of pet heating pads will bring up some as low as $15 USD and I doubt I could make one that inexpensive. My neighbor uses an old IR lamp I gave him to keep his outside cats warm in their cat house.
The dog is still alive. I know. It barks all day long in the winter time. When the sun is high there's a small solar panel that powers an ultrasonic dog bark deterrent device I got from the pet store. During those times he only barks on the far end of the yard. But he still barks. And that's an issue for my wife. Some people here have suggested harming the animal, but I just can't punish an animal for having a bad owner.