Most of all cats love mice. The hunting instinct
is inborn. Even when you regularly feed your cats, it will not pass
up an opportunity to chase after any mouse that crosses its path.
Cats love to chase (and sometimes kill) mice. That's a given, and
something that most people do not find too alarming. In fact, people
in many countries still utilize "barn cats" to dispatch
unwanted rodents - a win-win situation for all parties (except the
rodents). The cats have plenty of food available, and the farmer
is assured of grain bins undisturbed by hungry mice. A perfect scenario,
Almost. In addition to barn cats, many suburban indoor-outdoor kitties
will occasionally bring home a small kill to proudly display, which
we humans (depending on our constitutions) might or might not allow
him to eat. If not, we might be tempted to just pick it up by the
tail and dispose of it in the trash container, or down the toilet.
The problem is that, depending on the region, those little mice
may be loaded with a variety of "nasties," that neither
you nor your cats want to encounter.