New study finds that dogs can smell when humans are stressed

No wonder dogs have earned the title of “man’s best friend.”

A new study published Sept. 28 in the “Plos One” journal found that our four-legged companions might have the ability to know when humans are stressed.

Researchers collected samples of 36 people’s breath and sweat before and after doing a task.

According to the study, the animals got the emotion right nearly 94% of the time.

Previous studies conducted found that dogs can already tell when a person is scared or happy, so researchers eliminated those competing scents for this study.

Dogs have 220 million olfactory receptors, which is more than quadruples the amount humans have.

By Scripps National.