Can dogs laugh?

What physical characteristics did Konrad Lorenz describe as part of a dog's 'laughing' during play?

• Closed jaws, wagging tail, and soft whimpers.

• Slightly opened jaws revealing the tongue, and a tilted mouth stretching ear to ear.

• Ears perked up, intense stare, and a low growl.

• Rapid blinking, curled lips, and a stiff body posture.

How do dogs express what is considered their form of laughter?

• Through a series of barks and growls.

• By making a panting sound through forceful exhalation.

• With a high-pitched whine followed by a yelp.

• By wagging their tails rapidly and jumping.

What is the correct way to mimic a dog's laugh to encourage them to reciprocate?

• Bark loudly and repeatedly.

• Round your lips for 'hhuh', open your mouth for 'hhah', and combine them continuously.

• Whistle a high-pitched tune.

• Growl softly and wag your finger.

How do dogs typically respond to human laughter, according to the concept of 'laughter contagion'?

• They become anxious and hide.

• They often appear to smile in response.

• They start barking aggressively.

• They ignore the human laughter completely.