The two cats who live outside are strays who came to us and adopted us. They are but two in a series that have come to us. The others have either disappeared or met sad ends. They keep the barn free of rats and mice. Tom, a big, black panther-like beauty is a great ratter who regularly leaves us 'gifts' of rats and mice on the back patio.
We would NEVER put our house cats outside. If you love your cats, don't do it.
That's right IMO. and I tried it all when I had my cat. By far this was excellent and worth the bit of extra in cost. Amazed how long it lasts too, for the clumping. I cleaned it out before work and then if necessary again at night.