How much does she weigh/How old is she? It's incredibly common for females go off feed around winter time, even in warmer climates where we might not notice much of a change in weather (Photoperiods, temperature, humidity, storms, etc can all be a factor). If you don't have a gram scale, I suggest you get one - they are a lifesaver and definitely help to calm down a panicky mind in times like these. As if by magic, a BP can go off feed for several months, and only lose a gram or two. If she is noticeably losing weight, then I would be more concerned, but if she is not losing weight, it's likely she is just fasting for winter/breeding season (even young girls that aren't large enough to breed will sometimes fast or become pickier around this time).

Do not leave even a mouse hopper in with her for an extended period of time without observing. Hoppers don't seem like they can do much, but I've known a couple people first hand who had their snakes injured or killed by a mouse hopper specifically. If they are big enough to walk around and their eyes are open, don't trust them to be nice to your snake.

If she is losing weight, get her to a vet to be checked up on. May be something as simple as constipation (reading up on some threads here will tell you what to look for) or it may be something more serious, but no need to worry based solely off of a BP not eating during winter/breedin season =)

As for trying other things to get her to eat, there are lots of threads here with excellent advice... involving scenting prey items with other prey items (I've had luck with rats/mice scented with - ASFs, Gerbils, Hamsters, Mice) or even changing up her enclosure (I have one girl that goes off feed and I can only get her to eat if I pack her tub with fake plants, 3 hides, and leave her in complete darkness).

Sorry for the novel... just, don't worry to much just yet - there are lots more things to consider still as to why she isn't eating =)