Unless you have taken part in the pre-hatching sale I offered earlier this season, everything I ship out will have fed on pinky mice at least twice. My procedure is to offer babies a live pink first, then the second meal will be a frozen/thawed pink. In most cases, the snakes will take both, but some will have a preference at this young age. Unless I have absolutely no choice in the matter, I will send snakes that have fed on both.