Open wide: Yawning is infectious - for dogs such as this Basset hound mid-yawn. Daily Mail
Revealed: Why Canines Yawn After Their 'Dog Tired' Owners -- The Telegraph
Dogs are compelled to yawn if they hear their owners do the same, a study has suggested.
Researchers claimed that dogs responded only to an audio cue such as a yawn even if they didn’t see the action taking place.
The study found this was particularly noticeable when the dogs were listening to the yawns of people they knew.
Scientists suggested the findings, presented at the National Ethology Congress in Lisbon, showed canines had empathy to human behaviours.
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My Comment: It should be noted that sometimes the owners yawn after their dogs do (at least in my case).