It was Father’s Day weekend last year when Betsy disappeared. Amid the bustle of Anchorage’s annual rodeo, the 3-year-old cow slipped out of her pen. Soon enough, she was headed for Far North Bicentennial Park, a 4,000-acre expanse of rugged forest at the outskirts of the city. The real-life cowboys at the rodeo saddled up their horses and headed for the park, but it was too late: Betsy was gone.