How did they do that?

   When I let my dogs out this morning they started barking at the edge of our fence but I didn't see anything. 

  I had a hard time getting them to stop barking and come back inside.

  The next time I let them out they ran straight to the edge of our fence and started barking and prancing.

  Again I looked but I didn't see anything. No dog, no cat, nothing. There was nothing there for them to be barking at.

  Again I had a hard time getting them to stop barking and come back inside.

  Then the next time I let them out they barked and pranced louder. Before I knew it they were digging in the dirt as if they were digging up burtied treasure.

  They wouldn't stop digging.no matter how much I yelled at them. 

  By the time I got up to them they had unburied a large turtle, that they were then fighting each other for.

  What was a turtle doing buried in My yard?

  Did you know that turtles dig underground?

  Somehow my dogs could sense that something was suddenly underground in our yard. They sure couldn't see it but they knew.

  I managed to get the turtle safely away from the dogs and release it in the wilderness where it would be safe.

  I would have never have guessed that a turtle would be digging a tunnel underground in my yard. Nature's wonders are amazing to see.

  Nor that my dogs would know if there was any animals living underground. 

How did my dogs know? And how did a turtle have the strength to move all that dirt as they made a tunnel underground?