This reminds me of a former neighbor’s lonely, insanely bored, extremely intelligent, high-energy Border Collie. She was acquired as a house pet, but because she kept herding the preschool boys into corners in the yard, they stopped playing outside.
She would get a glass-eyed stare and (through the fence) try to herd my moving car into a corner, me when I got out of the car, the geese on my property, birds in the air, anything that moved. Then she started ‘herding’ their toy plastic picnic table by flipping it over and pushing it around into each corner of the yard. Poor dog.
That really is a sad story. The border collie is the ultimate working dog: highly intelligent, distilled energy on four legs. My favorite border collie is Tex, who ~a year ago won the national first prize in agility. Here is Tex smoking the competition: