I had a mountain lion and bear hunting neighbor that kept a noisy bunch of hounds like those many years ago, when I lived in Buena Vista, Colorado. They definitely work as a single element when they're set free.
It's a big deal around here when you see a dog with it's head hanging out the vehicle window while the owner is driving down the road. My husband always mocks the "animal lovers" by sarcastically saying, "Oooh, that's animal abuse." I'm thinking that pic would make the news and have people picketing here. It is interesting how they all seem to have their own "window" in that pic. It would be interesting to see the rest of that travel set up.