My 3 year old girl, Ella, is a mouser too. She did eat a small rat once last year, but never since and I've tried a few times. I don't want to get too persistant in trying with her because she's sensitive and will back off eating if feels she been traumatized, lol.

She eats 2 large or 1 jumbo f/t mouse every 7-10 days. Doesn't sound like much, but she holds her weight extremely well and is right about at 2000 grams.

Other than the fact that multiple mice each week can get somewhat expensive, there is no reason a BP can't thrive on mice. I wouldn't worry about having a mouser unless you're concerned about the cost factor. But if she's your only snake, or the only one on mice, it shouldn't be too bad. Personally, I'd rather fork over the $$ for mice and have Ella EAT when I feed her!