Well......if you blow up the photo, you see a dark figure to the right of the lighter one. They look to be in the same pose leg wise. My guess is some type camera speed issue or shutter issue. It's hard to tell. In the reflection or lighter area, it resembles a cat head but it too may be disfigured. My best guess is hog, taken in a poor lit area with a shutter speed problem. IDK. Much like the moths in flight pic you get in a V shape pattern.
That lighter colored critter sure has a cat-like body, but after using the Picasa photo program, it's head looks more canine. The dark colored one is obviously a dog - most likely a pit bull - wearing either a radio collar or a neck-protection collar. It also appears the lighter colored animal is chewing on something. My best guess. Interesting anyway.