i successfully domesticated a feeder rat from a pet store that was absolutely not used to human handling. i know it's not the same situation, but if you're in a spot for sometime and can make friends with a young one i think it's possible. basically once my rattie realized that i always had food and that i wouldn't hurt her she trusted me and eventually let me pet her and hold her. now, she's just as friendly as my other rats who have interacted with people since birth.