Sounds like you got one of those headache BPs that people sometimes talk about. I've really only had a couple of mine do these extended strikes. One of my big pieds went 9 months with out eating. Mind you she was 3600 grams at that time so I wasn't to worried. She finally ate and now crushes everything in sight. I feed all live rats and have never changed. I'd say you're definitely doing your part. You may just have one of those picky ones.