[DinaCoder99]

Cats are unable or unwilling to tackle larger rats, including the ones outside my apartment. They're much better mousers than ratters.

[smegger001]

Depends on the cat and the size of the rats. I have had cats that would deposit dead rats along with their regular offering of mouse heads on my door mat, and one cat that hunted rabbits nearly her size. (As the rabbits kept invading my fenced vegetable garden I was okay with their predation)