That's a good kitty!
Not really! I let it go. Garter snakes are good, they eat bugses.
We don't have that many here. The place in Rochester I lived in was LOADED with snakes. Everywhere. I couldn't mow without chopping up snakes. It was really gross, I'd try to wait for them to get out of the way if I saw them in time.
There, I let the dogs and cats kill as many snakes as they could eat.