Farmers directing Border Collies to herd sheep use a whistling "language" that is able to accomplish - to an outsider - astonishing things. Watch some some vid

Farmers directing Border Collies to herd sheep use a whistling "language" that is able to accomplish - to an outsider - astonishing things. Watch some some videos if you haven't seen it. It's baffling. How much depends on the "language" vs training and breeding, I can't say.