Dogs are more expressive when someone is looking.

Dogs are more expressive when someone is looking.Dogs produce more facial expressions when humans are looking at them, according to new research.Dogs produce more facial expressions when humans are looking at them, according to new research from the University of Portsmouth. Scientists at the University's Dog Cognition Centre are the first to find clear evidence dogs move their faces in direct response to human attention. Dogs don't respond with more facial expressions upon seeing tasty food, suggesting that dogs produce facial expressions to communicate and not just because they are excited. Brow raising, which makes the eyes look bigger -- so-called puppy dog eyes -- was the dogs' most commonly used expression in this research.