Dogs can smell the difference between odors from humans when they’re stressed and when they’re calm, according to a new study
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. There’s now scientific evidence shedding more light on one of Barkley’s impressive skills in a long list of endearing traits: the ability to smell when you’re stressed. Dogs can smell the difference between odors from humans when they’re stressed and when they’re calm, according to a study published Wednesday in the journal PLOS ONE.
“It was fascinating to see how able the dogs were at discriminating between these odors when the only difference was that a psychological stress response had occurred,” she said. A powerful nose Dogs have 220 million olfactory receptors compared with humans’ 50 million, which makes canines “extremely effective at differentiating and identifying odors,” said Dr. Mark Freeman, clinical assistant professor in the department of small animal clinical sciences at Virginia Tech in Blacksburg.
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