How long would you last?

[NorthernRaider]

What about just not letting the moggies into your house, feed them outdoors so they dont bugger off, find a nice warmish place they can sleep etc. Seems a pity to bump of your moggies if you like them, like I say if they are any good they will keep the vermin at bay which get into far more places than cats do. Or they will have to remain indoors full time and you better go and buy a ton of cat litter ( which is another multi use product not just for cat crap)