I'm not thinking RI. Several of mine will sit outside of or on their hides, with their head on something else, just chilling. The typical RI posture is for the head to be pointing straight up, with the BP staying like that for hours.

Have you offered food in the evenings when she's most active? BP's are a nocturnal species. I know that if you offer prey and it's refused you're supposed to wait a week, but I've also had some critters refuse a rat at 3 pm, six hours later at 9 pm they're out hunting, I offer a rat, and they take it immediately.