Studies Show Dogs Get Teary-Eyed When They See Their Owners Again
According to a study, dogs shed
tears after being reunited with their owners after five to seven hours.
Currently, researchers are investigating whether dogs
shed tears when reunited with other canine friends.
Dog owners can vouch for their
pets’ excitement when reunited with them. In a new study, it has been shown
that dogs may shed tears when reunited with their owners.
On Monday, Current Biology
published the Schirmer Test, a specialized strip placed under the eyelids, to
measure tears in dogs’ eyes. In order to determine the baseline tears in the
dog’s eyes, researchers measured how many tears they shed during normal
interactions with their owners. Five to seven hours later, the amount of tears
in their eyes was compared.
In the first five minutes
following their reunification with their owners, tears were “significantly”
increased.
“We had never heard of the
discovery that animals shed tears in joyful situations, such as reuniting with
their owners,” said Takefumi Kikusui, one of authors of the study from the
Azabu University in Japan.
Love Hormones Are Responsible For Reactions
This reaction is caused by
oxytocin, the “love hormone.” Oxytocin is a key component of any bond between a
mother and child, a couple, or any human being.
After observing one of his
poodles with her puppies, Kikusui and his colleagues came up with the idea for
the study. When he nursed them, he noticed that she was crying. This led
Kikusui to believe that oxytocin could increase tears.
Compared with other familiar
people the dog was reunited with, the volume of tears was greater when reunited
with its owner.
Next, scientists investigated
whether the tears affected the owners’ emotions. The owners were asked to judge
how much care they would give their dogs in various photos that showed them with
and without artificial tears.
Photos of Dogs With Artificial Tears Ranked Significantly Higher Than
Photos Of Dogs Without Tears.
Kikusui hypothesized that when
dogs show teary eyes during interactions with their owners, they will be cared
for more. Parents are more likely to offer care to infants who cry, because
infants express their negative feelings through crying. Dogs have also
developed specific communication skills with humans over time, making them one
of the most domesticated animals. The relationship between a dog and its owner
is largely determined by eye contact.
It would be interesting to see if
dogs produce tears when meeting other canine friends in the future.
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