A few questions: How long have you had him? Has he ever eaten for you? How are you heating up the F/T mouse? We've had good luck placing the feeder in a Ziploc, thawing in warm water, heating it up a bit once thawed under a heat lamp in the room with the snakes, then blasting the nose of the mouse with a hair dryer before offering on tongs.

Different snakes have different personalities when it comes to feeding. Most of ours are eager eaters, but we do have one that will sometimes take off tongs, sometimes requires us to leave in cage and he'll come eat it. Make sure to feed at night. You can always leave the mouse in the cage overnight and remove in the morning if not eaten. Good luck!