In the high plains of Utah, cattle ranches rely on one breed of dog above all others to keep their herds under control: the brave, intelligent and tenacious border collie.
Over the course of thousands of years, humans have trained and bred dogs into the fastest, strongest, and strangest canines on the planet. Travel the globe, from the Arabian Desert to Arctic extremes to the coasts of Newfoundland, and discover the surprising journey of these pets and how they've evolved to change the course of human history.
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