Years ago, when I first moved into my ranch home, the boxes were piled up in the garage. It wasn't long before I had not cute litte mice, but RATS. Big ugly ones.
I kept trying to deny it in my head, but finally set up a camera and saw one moving around in the garage.
That's when I took action.
1) Got rid of everything in garage.
2) Set up the rat traps with peanut butter along the perimiter of the garage.
3) Although I estimated two rats causing the problems, over the next six days I caught 3 rats per day!! 18 RATS! They started big, and worked their way down in size to the youngest juveniles.
4) Repaired the hole in the drywall allowing them access under the house.
5) Prayed a lot.
After the initial carnage, I never saw another rat again. The peanut butter on the rat trap is as sure as death and taxes. I believe it is physically impossible for them to resist it! Thanks George Washington Carver!