just a question about fire hazard or overheating.I have 14 pads on my cages, either on rheostats or thermostats so that should protect against overheating or power surges correct? I use another 5 pads on feeders without rheostats or thermostats. I have heard of a uth overheating and burning a plastic tub.but have not had any problems. Even the smallest pad will heat up to 110 degrees in my experiance with the temp gun.