Cat Urbigkit journeys alone to spend a season on Wyoming's open range tending to a herd of domestic sheep as they give birth amid the challenges of nature - from severe weather to a wealth of predators. Her only companions are the livestock guardian animals (BIG dogs and a pair of burros named Bill and Hillary ) that repeatedly prove their worth in devotion to protecting the herd. Urbigkit offers interesting reflections on the role of pastoralists...