New Study Reveals Dogs Cry When Reunited with Owners
In a groundbreaking study conducted by Japanese researchers, it has been discovered that dogs shed tears upon reuniting with their owners. This emotional response is believed to be linked to oxytocin, often referred to as the “bonding hormone.” The findings, published in Current Biology, challenge the long-held notion that only humans express emotions through tears.
A Closer Look at the Research
The study involved observing the behavior of 22 dogs during their reunions with both their owners and familiar individuals. The researchers aimed to better understand how emotions manifest in canines, especially in affectionate situations.
Research Methodology
To measure the tear production of the dogs, researchers from Azabu University and Jichi Medical University employed the Schirmer tear test, a standard procedure used to assess tear volume in both animals and humans. Here’s how the process worked:
- Small strips of filter paper were placed inside the lower eyelids of the dogs.
- The tear volume was measured before the reunions and again shortly after separation for a period of five to seven hours.
- Comparative measurements were taken during reunions with familiar people who were not the dogs’ owners.
Significance of the Findings
The study revealed that dogs produced significantly more tears when reunited with their owners compared to their interactions with other known individuals. To further link the tears to emotional connections, researchers administered a solution containing oxytocin to some of the dogs. The results showed a notable increase in tear production following this hormonal intervention.
Expert Commentary
“We had never heard of the discovery that animals shed tears in joyful situations, such as reuniting with their owners,” said Takefumi Kikusui, a co-author of the study. He emphasized that these findings may point towards a deeper emotional connection between dogs and their humans.
Implications for Human-Animal Relationships
The researchers concluded that the act of dogs shedding tears might play a critical role in enhancing mutual relationships, potentially leading to stronger interspecies bonds. This revelation sheds light on the emotional capabilities of dogs and underscores the complex nature of their interactions with humans.
Conclusion
This remarkable study not only expands our understanding of canine emotions but also emphasizes the profound connection shared between dogs and their owners. As we continue to explore the emotional depth of our pets, we uncover even more reasons to cherish the bond we share with them.
