Has anyone tried using a heated cat bed outside? I know most of the heated beds are meant to be used inside, but there's one on Cat-Tail.com that they say can be used outside. I would love to get one for Snowball, what with the sudden temperature drop here (just this Monday it was still very hot!). It costs $55 so I want to double check to see if people have found it to be effective. If nothing else I think I'll get her one of those space age matts, the one's that reflect body heat back.