Have you tried him on a live rat? I have a jerk of a borneo that's the same way, pounds live, won't hardly touch a f/t. I bred mice and rats while I had several hatchling snakes but as they grew up, he was the only one who wouldn't take them prekilled or f/t. Everytime I get him eating f/t for a couple weeks in a row I think yay and then it's back to refuse refuse. Had to drive 1.5 hours and pay $9/rat last year over the summer because he hadn't eaten in awhile, had the rats upstairs in the room prescenting and offered him a f/t again to try, nabbed it right up. So for a couple weeks I just had pet rats that I stuck near his cage before feeding and tricked him into taking f/t with. Then I got ahead of myself, euthed and fed those two off, he's been hit or miss since but eating enough I'm not overly concerned about it. Not enough to get a new pet rat anyways. But just a thought!