We have two. I've had Zoe since she was about 8 weeks old; she'll be 14 y/o this summer.
And Deckster is a fairly new addition. We took him in this past fall. He was living under our deck, skinny as a rail, and missing an eye.
It turns out he is a 4 y/o (approximately) neutered male. He now lives inside and seems pretty damn content. Oh... He is no longer skinny as a rail.