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Well-behaved dogs generally have lower cortisol and higher serotonin, study finds
- February 4, 2026 at 7:00 PM
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Dogs who scored well on the Wesen test, which is used to analyze a dog's temperament, tended to have lower levels of cortisol, often called the "stress hormone," and higher levels of serotonin, often called the "happiness hormone," according to a study published in the open-access journal PLOS One by Minjung Yoon from Kyungpook National University, Republic of Korea, and colleagues.
Originally published at Phys.org