I have been doing this for a while and I found the hairdryer to be the easiest method to heat the mice quickly and that they stay heated for a while. However, I have been doing this heating individual rats and feeding heating another etc. this meant that I kept turning the hair dryer on and off. Today, suddenly the electric socket went poof into smoke!!! I unplugged the wall socket immediately and luckily it stopped and I looked at it and the plug was all burned and plastic melted. This scares me and I want another way to heat the rats now.
I used to use heat pads but they were pretty useless they heated very slowly and only one side and sometimes to it made mice guts expand/explode. Soaking in a sandwhich bag in warm water works well but then it takes quite a while to go through all the snakes and they cool down very quickly. How do you heat them?