How do I use the fence effectively as a tool during the boxing phase?

The fence in boxing is not simply a boundary that prevents the cow from escaping behind it — it is an active training tool that the horse and rider learn to use strategically to contain the cow and control the work. A team that understands how to use the fence during boxing can make even a challenging cow look manageable, while a team that ignores the fence's role as a containment tool will find even cooperative cattle difficult to hold in an organized pattern. The fence works primarily by limiting the cow's escape options to two directions — left and right — rather than four. A cow pressed toward the fence cannot escape behind it, which means the horse only needs to cover the lateral directions to maintain complete control. Pressing the cow toward the fence at the beginning of the boxing phase, rather than working the cow in open ground, takes advantage of this geometry and makes the horse's job significantly easier. A cow worked ten feet from the fence has a longer path to the fence behind it and feels less confined; a cow worked three feet from the fence is already nearly contained. The angle at which the horse approaches the cow during boxing also uses the fence effectively. A horse that approaches the cow from a slightly angled position — rather than head-on — pushes the cow toward the fence as part of the blocking motion rather than simply stopping it laterally. This technique keeps the cow's nose pointed toward the fence throughout the phase, which makes the cow's escape options more limited and the work more controlled from the horse's perspective. When a cow attempts to push past the horse during boxing, the fence can be used to help close the escape lane by riding the horse toward the fence corner at the cow's direction of travel. Cutting off the corner before the cow reaches it eliminates the lane without requiring the horse to run past the cow's shoulder, which is exactly the kind of subtle positional use of the fence that experienced cow horse riders develop through years of practice.