It would seem so, but not always. I once had a dog where I had him from a puppy and I was a little boy. He just had weird quirks we didnt see reasons for. One was he was deathly afraid of noises, he would also sometimes act like he thought we where gonna beat him or punish him and would cower(hed never been beat on before), and then the last thing was he would FREAK out if left alone in the car(windows rolled down always), He would just bark nonestop untill we came back plus he woudl also do this if we where leaving the house and leaving him alone.Sometimes dogs have mental disorders, just like people do. But we still love them both regaurdless :)