We have our own ideas about how to quiet dogs in a shelter [1], but here's a great new one ... play a recording of a dog laughing!

Researchers at the Spokane County Regional Animal Protection Service in Washington state say sometimes a bark is just a bark — but a long, loud panting sound has real meaning.

They say the long, loud pant is the sound of a dog laughing, and it has a direct impact on the behavior [1] of other dogs.

ABC News: Sound of Dog's 'Laugh' Calms Other Pooches [2]