Thanks BabyYo! Do you see where it's going... if Smokey is tethered then it might not be able to get completely over the fence, or completely separate itself from the ground to go over the fence. Therefore, like caged animals, it could only go back and forth looking for a way through!

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`Dear, dear! How queer everything is to-day! And yesterday things went on just as usual. I wonder if I've been changed in the night? Let me think: was I the same when I got up this morning? I almost think I can remember feeling a little different. But if I'm not the same, the next question is, Who in the world am I? Ah, that's the great puzzle!'

-- Alice, from “Alice’s Adventure’s in Wonderland”