I would like to think she wouldn't eat a rat, but after seeing her munch down those baby mice.....well anything is possible. She does have some food agression, maybe something was messing with her buried cookies or an old bone? I don't know. I know she freaked when our neighbourhood squirrel was stealing her milkbones from their hiding spot.
And I don't dislike all rats either, I wouldn't freak out if I saw one outside either, I would be ticked if it was a wild one in my house (but that is a whole other deal)
And Chico, Zoe thinks she is a cat, a 60 pound cat that can't purr. Two of mine couldn't care, but I do believe Dex and Zoe would make a fierce hunting team together.