https://www.wnd.com/2022/09/stress-odor-dogs-can-smell-study-says/

Feco, a single-purpose bomb dog assigned to a Coast Guard maritime safety and security team, wears protective eye and ear gear and a hoisting vest for hoist operation training at Moffett Air National Guard Base, California, June 15, 2020. (U.S. Air National Guard photo by Master Sgt. Ray Aquino)

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(JERUSALEM POST) — Dogs are known – among many other things – for their acute sense of smell and their ability to raise the spirits of the humans around them. Furthermore, existing research suggests that dogs can sense via smell when humans are experiencing stress.

A recent study out of Queen’s University Belfast published in the peer-reviewed journal PLOS ONE tested whether baseline human odors and stress odors were distinguishable to dogs in a double-blind two-phase study.

In Phase One of the trial sessions, a dog was presented with a participant’s stress sample (breath or sweat) alongside two blank samples. The dog was tasked with identifying the stress sample with an alert behavior. In Phase Two, the dog was presented with the stress sample along with the same participant’s baseline sample (taken when they were not stressed) as well as a blank.

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