Dogs cry tears of joy when reunited with their owners, study says
The human-dog relationship is unique among animals: having co-evolved for so long, most dog owners will attest to the uncanny ability that their canines have when it comes to reading and responding to emotions. But a new study suggests that the dog-human connection is so profound that our dogs actually cry for us, or with us.
Takefumi Kikusui, PhD, DVM, a professor at Azabu University and corresponding author on the study, told Salon by email, a "dog's teary eyes can facilitate human caregiving behavior to dog —. and this enhances the bond." The study indicates that "dogs' emotions are expressed in a similar way to human emotions" and that this "helps humans understand canine emotions."
Renee Alsarraf, a veterinarian and author of "Sit, Stay, Heal: What Dogs Can Teach Us About Living Well," told Salon by email that the study is a "good start" in terms of illuminating the phenomenon that many veterinarians and pet parents suspected — that dogs can "cry."