This one is so interesting! I see it symbolically as a fox hunt. Since the "horse" and the "rider" are illustrated by missing pieces of glass, and the "fox" is illustrated by an intact piece of glass, I'd say that the fox has won this round. He has somehow either out-smarted (out-foxed) his pursuers, or has found a way to take them out altogether. Since the glass is gone on the horse and rider, I'd say the latter. They are no longer a threat to the fox, but the essence of their existence remains as a reminder of what was.

I noticed too when I enlarged the picture that it even appears that the "rider" is wearing a helmet!