I feed nothing larger than a small rat (4 weeks old 45/65 grams) once a week.

If your BP eats rats, a small rat will be enough, if your BP eats mice 2 to 3 depending on their size will be enough.

One thing here that got my attention are you sure your BP is a female? 34 inches long and 715 grams would be very small for a 2 years old female and if it is indeed the case I would highly recommend you to have her check by an herp vet and have a fecal done.