Sit Tight, Pooch, I'll Just Be a Minute

It's a common sight: man's best friend left alone and whining in a car, awaiting his owner's return from a quick errand. But what is that silent emotion expressed on the face of a dog staring through a fogged window? That face you've only seen in passing? The camera lingers on forlorn puppy mugs in this slideshow; each image exposes a nuanced feeling of rejection.