I'm sure someone with more experience on 'picky' eaters will be more knowledgeable and chime in but...
I would try Rats and just supervise.. Is it possible that you may have been offering prey too small for her interests? I'm sure you are aware of the 'proper' recommended sizes so I won't re-list them.
I always offer appropriate size meals on a schedule (even during blue) and I never get refusals.. I might just be lucky thus far though..
Love the FF VII reference btw =)