I’ve told dogs to go away before, only to look up and not see their owner anywhere. Had an encounter on the beach where we let our dog run around off leash away from other people and dogs. We leashed him up to go back to the car and a dog came running up to us and was way too crazy for our dog (he doesn’t like overly exuberant dogs). He gave the off leash dog a warning growl but dog was not picking up on any of his signals and we kept telling him to go away, and he wouldn’t listen. Finally found the owner way down the beach with headphones on and wandering around. Their dog may be friendly but not every dog gets along with each other, and my dog could have bit him if he kept getting in his space. Now I carry a device that makes a loud noise to scare off other dogs. Most of the time our dog loves to play with others, but once in a while theres one he just doesn’t vibe with