Ever yawned in the morning and your dog did too? Recent research shows that dogs demonstrate empathy and emotional connection to their owners this way.
This relationship can make the dog more sensitive to a familiar yawn than a stranger, like humans.
A dog that looks at you probably loves you. Like people, dogs look us in the eye to show affection. Your dog releases oxytocin, the "love" hormone, during this staring contest.
Looking into one another’s eyes can increase hormones associated with social bonding.
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Have you seen your dog swing his tail like a propeller? They do this because they're thrilled to see you. Treats, toys, and his favorite banter will make them do it more. Consider the “helicopter tail” a smile.
The Other End of the Leash," a circle wag indicates a very happy dog.
I can not remember ever seeing it on a dog who appeared to be anxious or potentially aggressive, either defensive or offensively.