squirrel scampering across ledge on fence

 Looking  thru the french windows to see the squirrels, Willie, would start this hysterical barking which meant, "let me at them." I'd pull open the door, and he'd take off down the stairs, barking and running.  He'd run the length of the fence, hoping that the squirrel would trip and fall from the sky into his mouth. Of course, this would never happen and each day he would get up hoping for sweet success. What an optimistic dog.