I always imagined a "welcome mat" sized dog. They're not kidding around! That's one large dog to beware of!! Thanks for posting.
Yes exactly that is what I was thinking too. Plus I am not sure i realized that it appears to be at the end of a hallway.
I had presumed that maybe these pictures were zoomed in on one section of a much larger mosaic, like we often see when they uncover rooms of old buildings.