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Dogs Are Sentimental, Study Shows They Get Teary-Eyed When Reunited With Owners

dogs are sentimental

Dogs are sentimental. Dog owners know the pure joy of returning home from a long trip to be greeted by their tail-wagging, uncontrollably jumping, face-licking companion.

But those ecstatic canines might be shedding more than just fur on your clothes — they might also be tearing-up, according to a new study published Monday in the journal Current Biology.

“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, which he called a possible “world first.”

The scientists measured the amount of tears in the dogs’ eyes with the widely-used Schirmer test, which consists of placing a specialized strip under the eyelids. For a baseline reading, they performed the test on dogs during a normal interaction with their owner.

When dogs were reunited with their owners after five to seven hours of separation, they “significantly” increased tear production in the ensuing five minutes, the researchers found. This proves that dogs are sentimental.

They also discovered that the dogs’ volume of tears were higher when they reunited with their owner versus other people the dog is familiar with.

According to the researchers, this reaction to tear up is likely linked to the release of oxytocin, nicknamed the “love hormone,” due to its connection with bond-building.

The scientists then sought to test whether the tears might have an emotional impact on the owners. To do so, they asked the owners to rank various photos of their dogs with and without artificial tears by how much they wanted to care for them.

“The dog photos with artificial tears were ranked significantly higher than the normal tearless dog photos,” the Japanese research team wrote.

“It is possible that the dogs that show teary eyes during interaction with the owner would be cared for by the owner more,” hypothesized Kikusui.

In humans, the authors note, infants share their negative feelings by crying, which leads to more care-giving by the parents.

Domesticated by humans like no other animal, dogs have developed specific communication skills over time. Eye contact has been shown to play a role in forming the relationship between a dog and its owner.

In future studies, the researchers would like to test whether dogs similarly produce tears when they meet other canine pals.

Sources: AFP

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