Dogs or cats–who loves their owners more?

(WCMH)–Cats and dogs both make good pets, depending on the owners. But which species loves their owners more?

A new study done by researchers for a BBC documentary measured both dogs and cats for oxytocin, a hormone that simulates pleasure in our brain and helps us bond with our offspring. They found that dogs produce almost five times more of the hormone.

Researchers tested pets for oxytocin levels before and after they saw their owners, reported. Researchers swabbed 10 cats and 10 dogs for saliva, then had them play with their owners for 10 minutes. After, the saliva was tested again.

Oxytocin levels were elevated in both animals, but dogs showed an increase of 57.2 percent of the hormone compared to 12 percent in the cats.

One dog’s hormone went up a whopping 500 percent.

According to People Magazine, Dr. Paul Zak, who examined the results, “was really surprised to discover that dogs produced such high levels of oxytocin.”

He adds, “it was also a nice surprise to discover that cats produce any at all. At least some of the time, cats seem to bond with their owners.” provides commenting to allow for constructive discussion on the stories we cover. In order to comment here, you acknowledge you have read and agreed to our Terms of Service. Commenters who violate these terms, including use of vulgar language or racial slurs, will be banned. Please be respectful of the opinions of others and keep the conversation on topic and civil. If you see an inappropriate comment, please flag it for our moderators to review.

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