Here's my take on hotspots (which all of my racks have): I trust that my animals know what they need more than I do, so I offer them a choice of temperatures.
I started out doing this because I was new and we were all getting to know each other. Yes, I have learned to interpret their behaviors better now than when I first started, but since then I've had good, consistent results and I don't feel the need to change. As the old saying goes, "If it's not broke..."
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