In a recent study published by Psychology Today, a researcher examined photos of dogs and their humans to find that 81.6% of dogs show signs of discomfort, stress or anxiety. 7.6% of the photographs rated as showing signs of comfort and the remaining 10.8% of the dogs showed neutral or ambiguous responses.
The study reports that signs of anxiety (that aren’t as obvious as bared teeth) include turning its head away, closing its eyes and showing a “half-moon eye” where you can see the white portion of the eyes at the corner. Another sign of stress or anxiety is when its ears are lowered or slicked against its head. Yawning, raising a paw, lip licking or licking a person’s face can also be a sign of anxiety.