Man, that's a big dog!

SWMBO is always concerned about dogs riding in the backs of trucks without being leashed. She's concerned they'll jump or fall out. But they never seem to do that. This guy looked a lot bigger when he stood up with his front paws on the side rail. The next day I saw a truck going down the street with three German Shepherd's in the rear. Couldn't reach the camera for a shot, though.