Le Pet(omane)

A foul odor floats around the room, as if a phantom skunk is skipping from chair to chair, waving an invisible rotten egg beneath the nose of everyone present; or perhaps the local sewers have exploded and we shall soon be engulfed by a rising tide of effluence. But no, the source of the disgusting smell is more mundane than that: an evil fart has been silently expelled from somebodies turbulent nether regions. Open the windows and light a match before we are forced to evacuate the premises.
The dog did it, everyone agrees, for such a wretched stench could surely never emerge from the bowels of any living person. Frowning human faces and accusatory fingers converge upon the poor, bewildered animal, who, unable to deny the charge, silently assumes the burden of guilt and shame. 

Not only are dogs a man's best friend, they are also his best and most convenient scapegoat. "The dog did it" is a sort of pet-owning equivalent of the mystery author's "the butler did it." Dogs don't complain or seek redress, however; they just look sad and go back to sleep. But, like the foul odor itself, a sense of injustice must still linger in the canine mind. They probably do understand the irony and profound injustice of the situation: they sat beneath the dinner table begging for some chicken but weren't given any, and now fart fumes of digested chicken are stinking up the place and they're being blamed for causing them! It's like one of Job's hard luck stories from the Old Testament. In other words, a typical day in a dog's life.