Chihuahua puppy spotted in cardboard box in Sofia

A chihuahua puppy with tan fur and a black collar is standing inside a cardboard box. It is on a piece of corrugated cardboard covered with a dirty, light green towel. The puppy is looking up and to the left of the camera, trying to climb up the side of the box. It briefly barks, and then stands on its hind legs. A metal cap is visible near the upper right corner of the box. A black pipe is visible in the lower right corner outside the box.