Does she ignore both live and frozen? Rats and mice?
I rank the ideal prey as: f/t rat >> live rat > f/t mouse > live mouse (although this can vary a little bit depending on size of snake/size of prey). If a snake is refusing food for an abnormally long time and it can't be attributed to winter fasting, then I'll begrudgingly work my way down the list until I can get them to eat SOMETHING. After they eat a less-than-ideal meal I don't give them anything at all for two weeks. Then I offer them a f/t rat again. 9 out of 10 will go back to eating f/t rats following a single live meal. Almost like I have to jumpstart their metabolism after a long fast.