Update. Yesterday I offered her two live jumbo mice, one black one white, and she destroyed both of them. Im 99% sure she just doesn't like rats. Ive been able to have the store put a rat with mice bedding to scent it and have her eat it but its hit or miss.

Is there a better way to scent them or to get her to take the rats? She would probably need 4 mice to equal one rat.