Scientists writing in the Royal Society Open Science journal suggest dogs copy each other's expressions, just like people do, showing basic signs of empathy.
But Dr John Bradshaw from the University of Bristol School of Veterinary Science says more research is needed to establish if dogs are really able to sense what emotions are uppermost in the minds of other dogs.
Here are some pictures of your canine copycats.
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They say a dog is a man's best friend but Italian researchers suggest dogs bond with each other quite well too.