I agree with the above suggestions. Also, you could try chain*-feeding- but some BPs can be difficult to do this with, unless you're stealthy.(*No, don't make her eat chains!)
What I mean is, get 2 rodents on the small side so taken together they'd equal one decent meal for her. First, offer what the snake prefers, & then before they finish swallowing it- BEFORE they close their mouth for the last time- you must be sitting right there with the f/t prey on feeding tongs, & gently guide it in, RIGHT behind the one she's swallowing, nose to tail, so they're taken as one. If you can manage to do this without the snake realizing & balking, it seems to help them learn to accept the new flavor. But you do need to be stealthy.I'd try the "scenting with used bedding" first, it's much easier. But if you get really desperate, buy some dissolving sutures (or borrow a few strands from someone with long hair to sew with) & sew them together.
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