What is fence work in reined cow horse?

Fence work is the defining phase of reined cow horse competition and the element that most clearly distinguishes the discipline from both reining and cutting — the moment when the horse's athletic boldness, cow instinct, and precise training combine in a display of controlled aggression toward a single cow along the arena fence that is simultaneously thrilling to watch and demanding to produce. The fence work begins when a single cow is separated from the small herd in the arena and driven to the end fence by the horse and rider working together. Once the cow reaches the end fence and turns to face the arena, the horse must rate up to the cow — approaching to within a specific working distance that is close enough to control the cow's movements but not so close as to crowd the cow into panic — and then work the cow along the fence line as the cow attempts to escape past the horse to rejoin the herd. The horse controls the cow by running with it at speed along the fence, turning at the fence simultaneously with the cow to cut off the escape, and establishing the authority over the cow's movement that prevents the cow from getting past the horse and running free. The scoring of fence work evaluates several specific qualities. The eye and rate — the horse's ability to read the cow's movement and adjust his own speed and position to stay in control — is the most fundamental quality and the one that separates horses with genuine cow ability from those simply going through the mechanical motions of the phase. The turn at the fence — where the horse plants his hindquarters and rolls back toward the fence to cut off the cow's escape — is evaluated for speed, correctness, and aggressive authority. A horse that turns slowly, overshoots the cow's position, or allows the cow to get past him has demonstrated a fault that significantly impacts the score. The horse that reads the cow early, rates perfectly, and turns with explosive precision while staying between the cow and the open arena is demonstrating the qualities that earn the high scores that make reined cow horse competition so competitive and so demanding to win at the elite level. Fence work scores can make or break an otherwise excellent run, and the ability to produce consistently aggressive correct fence work is what separates the horses at the top of the open division standings from those with comparable reining scores but less developed cattle ability.