Good Lifestyle

Maybe your dog enthusiasm when you cross the door, or jump and lick When they want to play. In several of these cases where your four -legged friend is happy, they could also stir their tail. However, new research indicates that the tug of the tail of dogs is not always A good thing, because he found that the emotions of a dog could be directly linked to the direction in which his tail stirred.

In relation: How to know if your dog is really a "genius", says a new study .

Published in the journal Biology letters , a new article in the journal has examined more than 100 studies on the reasons why domestic dogs stir the tail, focusing on four different aspects: how the recovery of the tail works, its development, for which it is used And how he evolved.

In speak with Nowsweek ,, Silvia Leonetti , the first author and research assistant for the comparative bioacoustic review article in the Max Planck Institute for Psycholinguistics, explained that dogs "seem to use their tail mainly for communication, rather than for any other function". She cited the contrasting examples of cats using their tail for balance and horses using theirs to move away from flies.

But perhaps the most interesting observation of their research is that dogs tend to stir the tail to the right in positive situations - "for example when it has been shown their owner or a familiar person", "as "When we show him an unknown and dominant dog or in aggressive situations. ""

It should also be noted that dogs may be able to collect these emotional clues to other dogs. "For example, dogs show more [behavioral] and physiological signs of stress when looking for dog silhouettes of dogs which stir on the left compared to biased agitated dogs," said the article.

However, the article also notes that the dog levels of the stress hormone cortisol are not directly in correlation with the direction in which their tail has stirred, pointing towards the influence of environmental factors.

"There was a study, for example, which looked at the refuge dogs and how dogs stirred their tail before and after being animal by a human," said Taylor Hersh , co-author of the article in the Revue de l'Oregon State University, in a interview with Science . "The dogs who had been admitted as wanders had their cortisol levels that drop after being animal by a voluntary refuge. The dogs who had been rendered by the owners did not show this drop. In both cases, Dogs stirred the tail more when they were pets, but their stress levels changed differently depending on their life story. "

In relation: The real reason you should never wake up a sleeping dog, the veterinarian warns .

By trying to understand how domestic dogs began to stir the tail to show emotion (as opposed to other dogs like wolves that barely stir up), said Leonetti Science This hypothesis is "the humans consciously or unconsciously selected of dogs who stirred the tail more because we are very attracted to rhythmic stimuli [like music, or the hammer of a horse's hooves]."

Another possibility is that humans "selected dogs for docility and taminetity, but these features were genetically linked to the behavior of the tail," she said.

But whatever its origins, the resumption of the tail is certainly an important part of the canine-human relationship. There are still gaps, however, to determine how it has been developed and whether or not a dog knows how to control these movements. "We simply point the surface," Andrea Ravignani , a main author of the study, and an evolving cognitive scientist from the University of Sapienza in Rome, said Nowsweek . AE0FCC31AE342FD3A1346EBB1F342FCB