This dog was out with its owners for a Sunday breakfast at a likely-overpriced restaurant in the Gaslamp Quarter. It was a nice, sunny morning, the mood at the table was convivial, and the streets around the little enclosed eating area weren't too crowded yet. I can think of no reason that this dog should look so sad. Unless maybe it didn't want to be sitting next to a bag of what appears to be its own poo. Though, I don't know--I mean, certainly I wouldn't enjoy that. As far as I can tell, though, my own dog rather likes his poo, so who knows?
Technical info: Shot with a Nikon D40 and Nikkor 50mm f/1.4G lens, in manual exposure mode. Aperture f/1.4, shutter 1/800 sec, ISO 200. Post-processing in Aperture 3: minor straightening, but otherwise this is straight out of the camera.
Thoughts for improvement: I like the depth of field here for separating the dog and fence from the background, but the quality of the bokeh isn't great, which is an artifact of the lens. I also think that this would have been better just a little bit to one side or the other, to either completely include or completely exclude the fencepost along the left edge.