Re: How many ways to skin a cat...OT
buy a bb gun and shoot them. Get a cheap low powered one and you won't kill them. It'll just sting like hell and after a few shots, they won't be back.
The old one pump trick ! They will be back in a few days. Trap and relocate 30+ miles away , preferably to a no kill place is my choice, remove any collars and external ID tags.
If it was my indoor-outdoor cat, I'd be hard pressed to look for it 30 miles in every direction, huge area to cover. You might look in your town, and beyond that consider it roadkill or coyote victim.
Outdoor cats live 5 years average, a housecat can go 20 years. If I were a cat, I'd want my freedom.