How do you rate behind a cow at the fence?

Rating behind a cow at the fence means maintaining the correct position — at the cow's hip, one to two horse-lengths back and slightly to the inside — while matching the cow's speed precisely enough that the horse neither overruns the cow's position nor falls so far behind that it loses the ability to accelerate ahead of the cow in time to make the turn. The rate position at the cow's hip is critical because it keeps the horse in the cow's blind spot or peripheral vision, reducing the cow's awareness that the horse is preparing to pass, and it gives the horse the most direct angle to the cow's shoulder when the acceleration begins. A horse that rates too close to the cow will run into its hindquarters when the cow slows suddenly; a horse that rates too far back has too much ground to cover when it accelerates for the turn. The speed matching that correct rating requires is the same rate control that the reining foundation installs through large fast and small slow circles — the ability to adjust pace from the seat in increments rather than through dramatic rein intervention. In cattle work, the rate adjustment happens in response to the cow's pace rather than the rider's predetermined plan, which means the rate control must be light enough and responsive enough that it operates as an almost automatic response to what the horse sees the cow doing. Horses that have genuine rate from the seat can manage the pace adjustments of fence work with minimal rider intervention; those that require strong rein management for every pace change will struggle to maintain correct rate position while the rider simultaneously plans the timing of the acceleration for the turn.