It's really a convenience thing for me. When I got my first BP I was told she only ate live mice and instead of trying to switch her I feed her live. She never had a problem killing the mouse but it was such a pain to go to the store every week and some days they only had smaller ones. I tried keeping 3 of them for a while, but I think mice stink. It is much easier to take rat out of my freezer, warm it up and offer it to her. My BPs get feed on a consitant 6 day schedule now instead of the variable 6-10 day schedule. So I know my BPs could eat live, but it's easier for me to feed f/t.