We know that dogs are a mans best friend, well now studies show that our dogs actually cry when they miss us. Gives the saying puppy dog eyes a whole new meaning.
“Unlike any other animal, dogs have evolved or have been domesticated through communication with humans and have gained high-level communication abilities with humans using eye contact,” write the researchers. “Through this process, their tears might play a role in eliciting protective behavior or nurturing behavior from their owners, resulting in the deepening of mutual relationships and leading to interspecies bonding.”
The tears don't literally roll down they actually build up in the pups eyes causing them to swell up producing the puppy dog look.
the study that as done was observing the dogs when they were away than reunited with their owners. The scientists observed that they noticed a difference in the dogs eyes before and after being away.
“We found that dogs shed tears associated with positive emotions,” explained study author Takefumi Kikusui in a statement. “We also made the discovery of oxytocin as a possible mechanism underlying it.”
The final study that was done was taking pictures of the dogs before and after and they observed a difference in the pups eyes appearing more puffy than before the owner left.
“Dogs have become a partner of humans, and we can form bonds,” said Kikusui. “In this process, it is possible that the dogs that show teary eyes during interaction with the owner would be cared for by the owner more.”
Looks like the puppy dog eyes really is a thing, I know im going to hug my dog a little tighter tonight how about you?
SOURCE: IFL SCIENCE