I don't have a bp yet, just a watersnake, but Levi gets fed once or twice a week, depending on the size of fish he gets. Once I get him on a diet with more uniform sized food, I'll probably be feeding him every four days. With him, I'm kind of playing it by ear since there's not much information on watersnakes online. He's growing, he's active, and hasn't had a bad shed yet, so I must be doing something right, lol.