Hard to get rid of cats unless you kill them. But you can spook them with an airsoft gun. The cats in my area rummage through the garbage so I used my son's gun to shoot them. They don't die or get wounded but they'd run like their tails on fire. Good sport. Was a nightly habit for some time. Sometimes I'd set up behind an open window in the daytime & snipe those little buggers. Eventually, they avoided my place.