Mental Torture
Our cats did this all by themselves. Our neighbors got a small yappy dog and they would let it go outside. Our cats figured out if they sat on the fence and stared at him, it would drive the dog completely insane.
They were completely safe because the dog couldn’t jump that high. They would sit there just watching him lose his temper.
The neighbor asked us to please tell our cats to stop torturing their dog, and we said, “Well, they’re cats…they’re not really gonna listen to us. How about you don’t leave your dog outside all the time?”
The guy was kind of a jerk anyway, so we didn’t have much motivation to stop them anyway. The dog seemed to be on the verge of losing its sanity, so eventually, they just stopped leaving the dog outside all the time.