My Burm and my Ball will readily take either. I've been out of frozen, and it's usually more convenient to stop by the close LPS and grab a couple of live critters than it is to drive way over on the other side of town where the frozen goods are.

Personally, I haven't had a rodent bite my snakes yet. I try to pay close attention when they initially grab and begin constricting, to see the position of the rodent's mouth, and if it would pose a threat to my babies...so far, so good!!