Ambient heat only is the best

[DennisM]

I never said it wasn't.

I never said you did. My point is whatever your setup is, it needs to be monitored, thus I am in agreement with you that this is not something to be done casually. And I pointed out a couple considerations about ambient room heating that I haven't previously seen mentioned. We all know there are different means to the same end. On this topic all that really matters is the animal's well being. Everything else, as always, is a matter of keeper preference.