I got the cooling rack idea from @aart. I'd post the thread link, but I'm in the coop using my phone. I'm working on integrating my 3.5 week old chicks today. I cover the pad with press and seal, then cover with a towel, so they aren't on the press and seal. No it doesn't over heat it. I use 2" packing tape to hold it on the rack. The chicks do fine with the pad on top. Aart uses small bungee cords to hold it up underneath the rack. It's like everything else with raising chicks/chickens, there's more than one way to do it.