Already been said, but I'll summarize key points.
1. She's right around the age and weight when they often start going on longer fasts.
2. Weight loss seems in line for 5 months, but if you are worried, or have other concerns, a stool sample (if you can get one) and ruling out any other issues makes sense (RI is an example of something major that would make a BP stop eating).
3. Offer the same food items she's used to eating, but not more than every 3-4 weeks if she's fasted this long. When my BP, Shayna (who turns 8 this September) starts her winter fasts, and I am sure of it (2-3 refusals - and she's offered a small rat every 2 weeks), I begin offering every 3-4 weeks at a minimum until she takes a meal in spring.
It doesn't hurt to make sure the food is properly defrosted and then warmed up for her right before offering.
4. When they are not interested, it's normal for them to seem afraid or bothered by the prey items.
It's also normal to stay on the cool side, not be out at night (hunting for food), etc.
5. A move, even in a room, can (potentially) throw a BP off food for a bit, especially a happy and healthy one.