Your pet pooch may get jealous, but researchers found those puppy dog eyes are not a sign of guilt. In fact they are just the way we interpret a dog’s reaction to being scolded. Alexandra Horowitz, from Barnard College in New York found all dogs looked ‘guilty’ after being told off for eating a forbidden treat like a biscuit - and those who were wrongly accused often looked more ‘guilty’ than those who really deserved to be in the dog house.