I got a cat that has bobcat ancestry. That sucker is regularly clearing out every mouse in the barn and is now sitting in the kitchen waiting for one to come within snapping distance. It took him awhile to grow into himself and realize that making noise was inhibiting his abilities, but once he grew out of kittenhood, the massacre was on. He drops things at our doorstep every once in awhile just to let us know he's "on the job"
I have always held by good mousers as the best organic mousetrap. Because of my childrens reactions, I cannot use dispersal chemicals and traps don't hunt down the nest. The cat has hunted down 5 nests for me. Granted, the cat cannot go into the walls of the house. For this I would have to use poison, except that the cat may also get poisoned by eating the bait OR the mice that eat the bait. I may have to just live with the few that survive in the house. Luckily theres no where in the barn to hide. No closed walls in there! The cat is looking decidedly well fed heh heh