Mine normal female is the same way. She took pre-killed small rats twice and then decided she wasn't interested. She's still pretty picky though. I try to feed her a medium and a large mouse a week. Sometimes she'll eat both and sometimes she'll just eat the medium and won't care at all about the large at all.
For anyone who knows, I've heard on multiple occasion the phrase "1,000 gram wall" and wondering what's that about. My female right now is at 956g. Thanks!