Don't yawn - you'll set me off!

Humans may not be the only ones to find yawning contagious. Recent research by psychologists has found that dogs were far more likely to break into a yawn if they witnessed humans simulating the action. The research team recruited 29 pet owners and their dogs - labradors, border collies, yorkshire terriers, and dobermans. They found that when the experimenters mimicked yawning, 21 out of 29 dogs showed contagious yawning.