Scientists have discovered that dogs can smell stress in our breath and sweat.
Four dogs – pets volunteered by their owners – were trained to "choose" one of three scent canisters.
And in more than 650 out of 700 trials, they successfully identified a sample of sweat or breath that had been taken from a stressed person.
The researchers, at Queen’s University Belfast, hope their study will help in the training of therapy dogs.
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