I got my BP from a great breeder (based on reviews) but since getting her she has refused to eat. She'll "S" up and look all menacing but then after a bit she just slithers away. I'm feeding her f/t rat fuzzies, which are the appropriate size. Well today, I offered it to her and she was striking it without coiling up and hissing like crazy. Literally every breath was a hiss. She was striking at anything that got near her (including my hand, ouch). I haven't seen this kind of behavior before, is she just having a bad day? Should I give her a week with no food and try again after that?