I had one experience where some new construction and a typical house repair led to a packs of rats invading my home. I got an old school rat trap and waited. Thing about the spring loaded traps, the rats don't always die. In fact, those little bastards seemed to get just trapped and not knocked out or killed so they would scream. I was not expecting this. Then I got out my air rifle, scope and all and did a little target practice to put the rats out of their misery. I haven't seen any rats since then.
There is only one way to combat the mouse problem: Don't let them in. At night, turn on every light in the house. Go outside with a bunch of steel wool and fill in every little hole where you see light.
Steve!!! How could you leave out the epic quest of Nootch and I hunting the honey island swamp monster?
You need a little more than rat shot when you're after the swamp monster. Nootch, the master of camoflage, is pictured in the background to the left...in his ground stand.