Scarecrow Sprinkler. Motion activated and works wonders if you're plagued by unwanted cats in the garden.
The Scarecrow Sprinkler (image) is designed to discourage pests humanely. It uses water spray. - David Beaulieu
If the no pooping signs don't work, try this, Beth @themefragrance
Contech Scarecrow Sprinkler Hoses Down Garden Trespassers......great for the deer,squirrels,gophers! :)
ScareCrow Sprinkler Motion Activated Animal Deterrent. I bought one and it works great!! My bird feeders are finally safe....
ScareCrow Sprinkler Motion Activated Animal Deterrent
ScareCrow Motion-Activated Animal Deterrent
ScareCrow Sprinkler Motion Activated Animal Deterrent: to spray all the stray cats that pee in my bushes and terrorize my indoor kitties.