As other have mentioned BP's are hard to train when it comes to feeding... Persistence in trying F/T I have found to be best... Some of the users here suggested not Thumping/Stunning and the only objection I have to this is I've had 100's of snakes since I was 9 years old and on the snakes who have never taken to pre-killed or f/t not one time did any of them not strike, wrap up a thumped mouse.. snakes don't eat a mouse that they think has been killed w/o wrapping up on them. As far as cruelty to the mouse seriously??!! its about to be food... Mice know almost instantly that they have been put in a tank with a snake so they are already a scared feeder and already a dangerous threat. Another thing you need to think about is a live mouse biting your snake.. Snakes are quite capable of killing any mouse but in the process they could be bitten. (this has happened to my snakes who wouldn't take anything but live that I didn't thump, this happened to my kingsnake last week)... I'm not discrediting the other user's opinions however i'm giving my opinion to help keep your snake safe until it starts taking F/T. (now watch all the hate replies after mine)