Do you know how much she weighs (in grams)? If you have access to a kitchen scale, that's an easy way to measure. If not, do you have a picture of her that you can share with us?

Once they reach about the 500 gram mark, you can start feeding them an appropriately sized meal once/week. For this size BP, that will be a small rat (which is the equivalent of about three adult mice per feeding). Once you get on this schedule, you've solved your wanting to handle problem.