i feed live and always dangle the prey from tongs, my BP has gotten pretty good at grabbing the prey directly on the mouth essentialy pinning the mouth shut. i've never had a bite so far and hope i never will.
i have tried feeding f/t to no avail, and when i got snake it was extreemly under weight so i really couldn't wait it out to see if it would finally take f/t without jeprodising the health of the snake, i guess we all do what we have to.