Acute stress changes the compounds found in human sweat and breath, research has shown. For the new experiment, four dogs were presented with sweat and breath samples collected from human volunteers — before and after the people engaged in a difficult math exercise.
The dogs, including Minnie, were presented with samples from 36 people who gave sweat and breath samples before and after doing a fast-paced arithmetic task.“While it is likely that in a real-life context dogs are picking up on our stress from a variety of context cues, we have shown using a laboratory study that there is a confirmed odor component that is likely contributing to dogs’ ability to sense when we are stressed,” Wilson said in an email.
The dogs' accuracy at detecting the stress samples — from 90 percent to 96.88 percent — was even better than the researchers anticipated. "Dogs have a formidable sense of smell,” said Dodman, who is also the author of “Pets on the Couch: Neurotic Dogs, Compulsive Cats, Anxious Birds and the New Science of Animal Psychiatry.”
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