Tori, were your BPs eating F/T rats or mice previously? Although live does seem to elicit a better feeding response, BPs are notorious for preferring mice over rats, also. I'm only pointing this out because I don't recommend continuing to feed them live mice if your intent is to keep them on rats. I would stick to the F/T rats until you have your colony built up enough to feed live rats (or buy live rats at the store). Just a thought.