@littlek,
They told us on CBC a couple of years ago that the North American population of mice has exploded. We had gotten completely mouse-free about then (Spring 2008?), and then there was an outside workers strike (garbage collectors, among others), and the following autumn, we were invaded again.
We have just gotten mouse-free again. Let's hope it lasts.
Don't rely on cats. Cats is the spawn of Satan,
and terribly stupid.