Not trying to be a kill joy here but feeding live it dangerous...there is the potential for the prey to injure the hunter...esp because both animals are captive and neither can run away if need be.
One example is a boa that was left in its cage with a rat. The boa did not eat the rat, instead the rat started to eat the boa. It ate the tail almost completely up to the vent, exposing bone. Here is the link to the thread on here about it
http://www.cornsnakes.com/forums/showthread.php?t=85805
Yes, even mice will do such things. I have seen it first hand. The very first snake we have over 3 years ago was a wild caught garter and at first only liked live prey. A few times I brought it home small mice and when it did not eat them fast enough, they would go in behind the head and attack various parts of the snakes body and tail.
It really is not worth the risk to your pet and the possible vet bills it may bring....switch to frozen thawed now, before the snake has a definite preference and the prey gets bigger and more dangerous.