I never thought I'd meet a dog that lies, cheats and steals, but Tornado-dog is that dog. Lying - if he has something in his mouth and I ask to see it, he will quickly drop it and grab something else to show me. He will also set a toy next to me and if I reach for it, he grabs it back. Cheating - when playing tug, he will give me the less comfortable end of the toy. And if I get the good end first, he will grab just below my hand so he can win and then will turn it around and give me the lousy end. Stealing - he did this more as a puppy, but he still takes random things and puts them in a treasure pile. It is usually plastic and paper, but nothing is completely off limits. I have watched him carefully during these behaviors and it is clearly intentional behavior. He knows exactly what he's doing. And what can I do? I just give him a hug and tell him he's a clever boy. So do your dogs have any vices?