Tick tubes, I had almost forgotten about them. I don't remember the particulars but they're easy to find. They are toilet paper tubes stuffed with cotton (or something a mouse would like to take to their nest) that are soaked in something that kills ticks but not mice. The mice take it back home where it doesn't leave the nest, which is supposed to limit the impact on anything but ticks. Not strictly permie, but not wanton destruction either. I'll bet the mice are happy with the arrangement. I decided my problem wasn't bad enough to use them so I can't give first hand experience
