Usually it’s the dog doing tricks for treats, but in this twist there are tricks alright, but no treats. I love watching the body language of the dogs as they try to figure out what happened.
Pssst, did you notice how some of the dogs looked to their owners off-camera for clues or help? This is a canine characteristic that shows how far dog behaviour has evolved from wolf behaviour. Wolves, not matter how young they are when exposed to humans, never learn to look to people for help. They are simply not wired to coexist in relationship with people the way dogs are.