A stock image to show a 'mad' dog. A stock image to show a 'mad' dog ... and behavioral changes such as lip licking, yawning, growling, biting, panting, chewing, hiding, destruction, clinginess ...

But is your dog actually mad at you? According to experts ... physical and behavioral changes such as lip licking, yawning, growling, biting, panting, chewing, hiding, destruction, clinginess ...