I must be one of the lucky ones, all 5 of my ball pythons converted to f/t no problem. Even the year old female i picked up that had only eaten live. I found that if i could not get them to hit it doing the rat dance i would just drop it ontop of a hide or somewhere and they would end up getting around to it, since they would seem interested just not strike and it has worked for me!! Now my RTB on the other hand is still a work in progress!!