Anyone with a farm has an ongoing rodent problem. I’ve noticed that other “alternative living” writers deal with this issue the same way they deal with everything — denial. (Of course, it helps that most of their readers live in the city.)
Once you’ve had an outbreak of rats in your brooder house and lose a whole batch of chicks to them (and you will — everything happens to you eventually), you won’t be able to regain the live-and-let-live attitude of yesteryear. But once you decide to make the area around hour house and barn a rodent-free zone, there are good ways and bad ways of doing it.