Funny. I have a 09 female myself and for the first time yesterday I gave her an adult mouse. Until now she has been on hoppers, she is still quite young. So I hold it in front of her, it is f/t, and she takes it right away. I check a few minutes later and it was like she was not sure what to do with it. She was looking all around and I thought she was going to slither away. So I left and went back in another 10 minutes and she finally had it by the head and was eating. I thought it might have been too big and I was freaking out thinking I was going to hurt her. It was pretty much the same size as the biggest part of her body, but compared to her head it looked huge.
Maybe it was too big?? I have never fed rats so possibly just the change made her react that way. I hope you have luck soon.