Fun fact

 

It is well known that dogs can yawn to deflect a perceived threat. If a person or another animal approaches a dog, that dog may avert his gaze and yawn. But did you know that yawning is contagious in dogs as well as humans? Research shows that the sound of a human yawn can trigger one from your dog. Research also shows it is four times as likely to happen when it’s the yawn of a person the dog knows.

 

Harr, A., Gilbert, V., & Phillips, K. (2009). Do dogs (Canis familiaris) show contagious yawning? Animal Cognition, 12 (6), 833-837 DOI: 10.1007/s10071-009-0233-0

Joly-Mascheroni, R., Senju, A., & Shepherd, A. (2008). Dogs catch human yawns Biology Letters, 4 (5), 446-448. DOI: 10.1098/rsbl.2008.0333