Out of 14 snakes I have only had one snake that hasn't switched to f/t. He was also a mouser and the only snake I had gotten from the Pet Store. I tried several times to have him switch even just to f/t mice but he was never interested ever. I think as long as she is showing interest you have a good shot.

I recently received two snakes from a breeder who only feeds live. It's taken me almost a month but FINALLY was able to get him to eat f/t. I put him in a smaller tub, didn't mess with him before feeding and put a f/t hopper that was super hot in his hide with him. Locking the lid and then walking away. He ate two that way!!

Good luck getting him to switch!