Some BP have their preference, I have 3 of them that no matter what you try, how long they have been of feed will not touch anything but a mouse.

That's ok with me not my preference but since I breed mice as well (I have a need for them for my colubrids) I have no problem with it.

My males get 2 to 3 adult mice a week (depending on their size)

The female get 4 to 5 of them (depending on their size)

The snakes mentioned are adults.