Dogs lick their mouths in response to humans’ angry facial expressions

If you're wondering why your dog is staring at you and nervously licking his or her mouth, it could be because of the look on your face.

During a recent study, researchers found that mouth-licking was triggered by visual cues (facial expressions). The findings indicated that the behaviour is linked to the animals' perception of negative emotions. Find out more in the video above.

See also: These are signs your dog might have anxiety

See also: Is pet cloning a new reality?

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