We have a barn cat that catches garter snakes, deposits them
in the barn in a place calculated to cause a great start to
poor humans, but generally doesn't kill them.

The poor creature is found there, playing dead, and has to be
transported back outside, across the creek, lest the game
begin anew.

But you really don't want your moggy to develop a taste for
wild-caught mouse-flesh. They carry intestinal worms and
other parasites, as well as some fatal neurological diseases
which can shorten the life of your cat and line your veterinary
surgeon's pockets.

Not to mention making a mess on the carpet or in your bed, or
where ever the cat chooses to hold the mouse by the neck while
disembowling it with her back claws.

"Look out little furry folk
He's the all night working cat
Eats but one in every ten
And leaves the others on the mat
And the mouse police never sleeps..."