If all else fails, try leaving the f/t mouse in with your BP in a small paper bag inside the cage. This normally works. You could also try putting the BP in another tank/container with some soiled mouse bedding (most petstores will give this to you readily) and then try feeding him. Thats what I always do with my BP (though I use my hamster's bedding) and he's always been good eater since day one.