in this area, I would not skimp, I'd go with what has worked for others. since the application is not what heating pads were originally made for, I think it's advisable to go with what has worked for others. if you have one and want to experiment, then by all means, go for it. you want to make sure that the heating pad does not have an auto off function or it will shut off after a while when you are not around and the chicks will perish. sunbeam seems to be the brand to go with, the one listed has an auto off override.Is there any cheap heating pads?