HA, I enjoy hearing of how creative our little ones are. but...
That's EXACTLY what they were bread to do !
The Terrier Breeds were "constructed" to be able to function on their own, think things through without Human intervention, and be the excellent "Varmeteers" that we know them to be. And, that included them getting from Point A to Point B on their own. It's so good to hear that the Breed is holding true to the original intent. It's not their fault, that we occasionally disagree with them, on where Point B should be