What are the most common mistakes riders make during the boxing phase?

The boxing phase exposes rider mistakes quickly and clearly because every positional error the rider makes shows up immediately in the horse's movement and the quality of the cow containment. Recognizing these mistakes — ideally from video review rather than only from feel — allows a rider to make targeted corrections that improve the work far faster than general practice alone. Overriding the horse is the most common and most damaging mistake riders make during boxing. A rider who is constantly steering the horse with rein pressure, adjusting the horse's position with every step, and micromanaging the lateral movement is preventing the horse from developing its own instinct and feel for the cow. The horse that is ridden too strongly during boxing becomes dependent on rein direction and never develops the initiative to position itself ahead of the cow's movement. The correction is to quiet the hands, use leg to encourage lateral movement, and allow the horse to make small positional decisions that the rider reinforces rather than replaces. Looking at the horse's ears or head rather than the cow is a positional mistake that causes the rider to react to what the horse is doing rather than to what the cow is about to do. A rider's eyes should be on the cow throughout the boxing phase — specifically on the cow's eye, shoulder, and weight distribution — because that is where the information about the cow's next move is located. Developing the habit of watching the cow rather than the horse requires conscious effort, particularly for riders who are anxious about the horse's performance during the phase. Allowing the horse to angle away from perpendicular during boxing is a form error that judges notice and that also creates practical problems with cow containment. A horse that is not square to the cow is covering less lateral ground with each step and leaving an escape angle that a quick cow will find. Maintaining perpendicular position throughout the phase is a discipline issue that improves with consistent correction over many sessions.