If you're needing to keep a small animal warm, but you find a heating pad for humans to be too hot, simply fill a glass bottle with warm water. Cork it or seal it and place next to your small animal. It's the next best thing and you can control the warmth.
Very good idea. I have raised many orphanded and abandoned kittens. And yes..the heating pads do get hot. I will try using the glass bottle filled with warm water the next time I have newborn kittens. Thanks.