Snorg - is he/she an Oriental? I used to have a Blue Persian. He was the nicest, gentlest, lovely cat who wouldn't harm a fly.
I now have a cat who just turned up one day. I did try to find the owner but was unsuccessful. He was in very good condition and obviously well looked after.
Anyway, he stayed, and I had to put a falconry bell on his collar to stop him killing everything in sight. He is a very big cat and very shiny. He totally ignores me and my family. As long as he is fed he is happy