Chicken_man_J
Songster
I like how you said its not burning hot like a lamp and they can regulate their body temperature.Frankly I don't own a thermometer, a plate can be assessed with your own hand - it should feel warm/hot, but not burning hot. You angle it yourself, usually the legs are adjustable.
That's up to your own preference. I don't feed medicated because I hope to build up resistance through exposure, but I keep Corid on hand just in case.