Good Boy!

You enter the room and you know something is going on, yet don't know what exactly.
Your dog is acting accordingly.
How is it that you can read dog's face like a book?

• What happened boy?
• And he turns away from the chewed book or broken wase or (oh my god!) the poo on the floor. So the best way to guess what happened is to look at dogs' tail.
  The tail points it out.