Don’t we have a rat problem too? I live in Manhattan, send us some of these cats!
Having had (pet) rats as well as a cat (briefly), I don’t think that cats are generally sufficient for rats. Fully grown adult rats are too big for cats to handle and they only take 10 weeks to reach a size that will make them troublesome for average cat. Remember that a feral cat does not have access to health services. If they are injured trying to take down prey, they will probably be dead shortly after. That havi…
What they can do easily is kill young, like most predators.