You can get a "Laughing Dog" CD to play to them.
Researcher’s recordings of canine merriment provide comfort to shelter pooches
Animal behaviorist Patricia Simonet had already studied self-recognition in Asian elephants and reconciliation between chimpanzees. But when seeking a new project about five years ago, she looked a little closer to home. “I was sitting there really at a loss for what I wanted to do next with my classroom,” she says. “And I was watching my dogs, and they were making this sound where they were lying on their sides just sort of batting at each other. They weren’t really exerting much energy but they were eheh- ehing all over the place.”
The “eh-eh-eh” noise sounds, to an untrained ear, much like a dog panting. But, she says, it’s more like an expression of joy. And on repeated listens, you can pick up distinctions: The sound that Simonet and others describe as the canine equivalent to laughter is sharper, and the time between sounds is longer.
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http://www.petalk.org/LaughingDog.htmlBJ Nash
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