In this article by By Megan Gannon, News Editor | October 31, 2013 we will read how scientists found thru studies that the way a dog wags its tail the affect it causes to other dogs in the area.
Tail wagging could convey more meaning among dogs than previously thought.
Dogs have different emotional responses to their peers depending on the
direction of a tail-wag, a new study found. Seeing a fellow dog swing
its tail to the right keeps canines relaxed, while a wag to the left
side of the dog's body seems to induce stress, the researchers say.
For their study, a group of researchers recruited 43 pet dogs of various breeds.
The animals were outfitted with a vest that monitored their heart
rates, and they were shown videos of other dogs either wagging their
tails to the left or to the right. [7 Surprising Health Benefits of Dog Ownership]
that watched left-side tail wagging behaved more anxiously and their
heart rate sped up, the researchers said, while the dogs that watched
one of their peers wag their tail to the right stayed ;
they even began to approach the dog on the screen, suggesting they saw
the right-side wagging as a signal of companionship, the researchers
But right-left tail wags may not be a form of secret dog language, the
researchers say. They think the direction of tail wagging — and other
dogs' responses to it — could arise from automatic responses rooted the different hemispheres of the canine brain.
Just like the left and right sides of the brain in humans are thought
to control different emotions and behaviors, the direction of wagging
might match hemispheric activation, explained study researcher Giorgio
Vallortigara of the Center for Mind/Brain Sciences of the University of
Trento in Italy.
"In other words, a dog looking to a dog wagging with a bias to the
right side — and thus showing left-hemisphere activation as if it was some sort of positive/approach response — would also produce relaxed responses," Vallortigara said in a statement.
"In contrast, a dog looking to a dog wagging with a bias to the left —
and thus showing right-hemisphere activation as if it was experiencing
some sort of negative/withdrawal response — would also produce anxious
and responses as well as increased cardiac frequency," Vallortigara added. "That is , I think."
Vallortigara and colleagues say understanding these responses could improve dog welfare, and perhaps even help develop new strategies to keep them calm at the vet.
The research was detailed today (Oct. 31) in the journal Current Biology.