The dog possesses the

Recent research shows that domesticated animals also possess this "love hormone" - oxytocin.

A new study by scientists at Claremont Graduate University in California (USA) has shown that animals also increase " love hormones " - oxytocin hormones when establishing or interacting with new relationships. Or easier to understand, animals also know "love" as humans.

Professor Paul Zak and his colleagues conducted several experiments at an animal farm in Arkansas. Experts observe and take samples of blood from dogs who often have fun together on the farm, and then compare them with any dog.

The results showed that when playing together, the levels of oxytocin hormone of dogs playing together increased by 48% compared to "lonely" dogs . This index is also considered to be in the top, when compared with people.

Professor Paul Zak, the author of the study, said: "The concentration of oxytocin is high in most people in love, it plays an important role in strengthening, nurturing relationships, strengthening friendships, fostering trust.

However, this is the first time I have noticed such high levels of oxytocin in animals. It seems that this love hormone will help domesticated animals form bonds, feel love, respond in the same way that humans do. "

However, he also emphasized that only domesticated animals will appear this hormone. Further research, the researchers found that the concentration of oxytocin will increase in the front of the brain, which will strongly stimulate the neurological zone, promoting cooperation between species.

The researchers conducted a second trial with 100 healthy people. These people get blood samples before being put into the laboratory. Here, they will play with a dog or a cat for 15 minutes. These subjects will then be tested again as well as measuring oxytocin levels in the body.

As a result, hormone levels in the human body also change. However, for each different animal, they will have different emotional reactions. Most people will be more sympathetic to dogs than cats. And conversely, dogs also show their affection for people who have just played with them.