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How Eye Contact Deepens the Bond with Your Dog: The Science of Oxytocin

Ever feel your heart melt when your dog locks eyes with you, followed by eager cuddles and licks? It's genuine love—backed by science.

Canine Love Hormone

A landmark study by Japanese researchers, published in the prestigious journal Science, reveals that mutual gazing between humans and dogs significantly elevates oxytocin levels—the hormone linked to love, trust, and bonding—in both parties' brains. The result? Stronger affection. So when your dog Fido stares intently, it's not just hunger; it's deep love for you.

This response likely evolved to help dogs bond with humans during domestication, which began around 30,000 years ago. Tests on wolves showed no such effect, highlighting dogs' unique adaptation.

Females Show Stronger Response

In the study, researchers observed 30 dogs with their owners (24 women, 6 men) and strangers for 30 minutes, then measured urinary oxytocin. Eye contact triggered notable increases in both dogs and owners.

In a follow-up, dogs received oxytocin via nasal spray before interacting. Owners of treated dogs saw oxytocin spikes, and female dogs gazed longer at their humans, amplifying the bond.