CLEVELAND - Researchers have found that our four-legged friends can get jealous and it may be our fault.
During a new study, researchers had dog owners play with toys while ignoring their own dogs.
Results showed that the dogs didn't approve of the lack of attention and some some even pushed their owners when they were playing with a toy dog.
Researchers think humans may have played a role in the development of jealousy in dogs. They believe the jealousy evolved in dogs because they've been domesticated for so long.