Hi all- new here and looking at putting my brooder together this week. I had an iguana for many years and still have all of the stuff, including a few reptile hot rocks. Iguana Joe would sit on it and warm his belly. I have never seen anyone recommend these so I wondered if they were too hot- or if there was another reason they were not used. It makes sense on a basic level that they would help the little ones stay warm. Let me know if anyone has ideas on this. Thanks