[jcwade]

The rat infestation up here in the mountains is out of control. We were gone almost all this month, so they ran wild and colonized everything, although I have not seen any evidence inside the house itself.
I have wood rats in the woodpile, in the basement and on the back deck.
They have chewed through some wiring in my wife's car, torn down insulation and left droppings everywhere.
We cannot poison them and put the poison into the food chain. They might be eaten by bobcats, mountain lions, bears, raptors or condors. The coyotes I don't care about.

I have tried sonic generators, various scents and oils, ammonia and traps. Nothing seems to work.
Does anyone have any other suggestions on what to do?