[In The Ten Ring]

I used to be an exterminator. An old company salesman told me a few things about the job (and nature) that make sense.

You don't need chemicals to keep pests out, you just need the right predators. Birds of prey eat birds, cats eat mice, snakes eat mice, lizards eat spiders, ants eat termites.

He also said cat urine was a great mouse repellent. I'd like to do some qualitative study in those areas some time.