well my teacher (who owns a bp) hangs the live rats by their tail over the tank and then the rat can't hurt the bp and you can see if the snake is not hungry without letting go. (and theirs nothing in humane about feeding live rats to a bp) (but there is about stunning a rat) I'm going to get one hear pretty quick and I think that I'll feed him or her live rats.
Being knocked out in one blow is much less pain full to a rat/mouse then being bitten, constricted, rib bones cracked, organs punctured and then asphyxiated.