A guy at my local reptile store showed me a way to kill them that works well for me (everybody is different though, and my wife can't do it.) I grab the mouse by the tail near the base and flick them hard against the bone of my wrist right at the top of their neck. It breaks their neck and they are dead, just like that. There's no twitching or anything; just dead. Other people like to use a CO2 chamber and "put them to sleep" with carbon dioxide gas. Someone once recommended that I put a pencil against the base of their head and push down hard to break their neck; that was awful, it popped the mouse's eyes out but didn't kill it. I would personally never recommend that method.

I also love rodents; we have a pair of pet hooded rats. They are not snake food! But then again, I also have pet chickens, even though I love to eat chicken!

I want to get my BP on frozen/thawed, if for no other reason than for the cost benefit, but I think pre-killed is sort of a stepping stone in that direction. At least he's eating them while they are dead, even if they are only recently dead!