Jealousy is not only a humanitarian case. A recent study has shown that dogs also feel jealous.

Scientists said that the dogs in California showed feelings of jealousy when he expressed interest in doll owners in the form of a dog during the experiment.

In the past, experts have confirmed that jealousy require Aware complicated, and it is a unique specialty of the humans. But researchers in a recent study said that their studies showed that jealousy may be generated naturally simple.

These results probably will not be a big surprise for each person owned a dog in the past, but the team said that this is the first experiment that shows the behavior of jealousy in friendly fully human.

And feelings of jealousy in humans are complex feelings require a "triangle socially," any relationship consisting of three people, and usually appear when an intruder is threatening an important relationship.

Reports say that jealousy is the third leading cause of killing is wrong in different cultures.

Based on the research that indicates that feelings of jealousy appear on young children at the age of six months, the scientists studied 36 dogs in their homes and have registered their behavior when they showed a video of their owners about the feelings of affection doll in the form of a dog.

And about a third of the dogs tried to distract the dog from Osahbha doll, while a quarter of the dogs tried to pounce on him and bite.

Said Professor Christine Harris of the University of California at San Diego, said that "Our study suggests that dogs are not only engaged in what appears to be the behavior betrays jealousy, but it also seeks to break the relationship between the owner and what it sees as a competitor."

She added, "We cannot really talk about self-tests for dogs, of course, but seem to have an incentive to what appears to protect important social relationship."

The researchers believe that dogs realized that the dog doll is a real dog, and the organizers of the research pointed out that 86 percent of dogs sniffing the back of the doll during and after this experience.

Harris explained that "many people believed that jealousy is a social construct of human beings, or that it is linked to feeling particularly emotional and sexual relations."

But she said, "Our results challenge these ideas, it appears that animals like us showing strong resentment when a competitor acquired the emotion the person who loves him."

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