Today my black lab (Boston) spread the garbage all across the kitchen, which hasn't happened since he was maybe six months old. When, I came home, as soon as he saw me slouched down, started shaking, ears back, quick half tail wags, and no eye contact! Guilty before I saw the evidence!
He does this anytime he's done something he shouldn't, I know to check the couch for his fur when I come home and he is acting "guilty", he just can't hide it
My yellow (Paisley), on the other hand will look at you with completely blank stare as if to say, "Apparently someone screwed with your stuff while you were gone."
Just curious about whose dogs have a conscience!