I have over 100 BP's and I feed a combination depending on who's eating what. For my adults that are eating mice, I feed them 2-to-3 jumbo mice on feeding day (retired breeders).
For anyone in Southern California, my mouse guy is superb; if you have a large collection he will deliver live mice at .55 each, no matter the size of the mouse, pinky to jumbo retired breeder.
BrandonsBalls