My cat just turned 12. He has never, ever been outside. My house does not smell of cat, spray or other secretions. Coyotes, Bobcats, owls, stray dogs roam freely outside. Dude is safe inside with lots of windows to look out and some open and screened in spring/summer. I grow grass for him and provide scratching areas. He has everything he needs. INdoors.
I'm sorry for your poor kitty.
If you get another one...please,please,please keep it inside.