Even the snakes that have come to me only feeding live will take FT or pre killed, just takes a little finesse. Using tongs, try moving the rat around in a natural way and even wiggling it a little. This usually stimulates the feeding response. That coupled with the blow dryer trick and you should be good. Just remember to be careful to not accidentally hit the snakes nose while doing the "zombie dance" with the rat, this can detour them from wanting to feed.