This year, when the cold came, we suddenly had mice in the kitchen addition we
put on in 2000. The construction did uncover and close several mouse entry
points, so I was hoping that we'd be done with that problem.
Well, I looked around outside and found what I thought was the NEW entry point
-- a gap under some trim. I filled it up with the foam insulation that turns
hard. In all, we trapped/killed one mouse before I filled the gap and two
after. Now, it's been a couple of weeks, the traps are empty every morning and
I haven't seen any more of their little poops in the kitchen drawers.
How do I know when they're REALLY gone?