What is the proper body position for a head horse during the corner?

The head horse's body position through the corner determines the quality of the shot the heeler receives, and correct position is specific: the horse should be bending through its entire body in a uniform left arc, with its spine following the line of the turn rather than straight through the body with only the head and neck tipped left. The hindquarters must stay engaged and driving through the turn — not swinging out to the right, which straightens the steer and eliminates the heeler's shot, and not cutting under to the left, which tightens the arc too severely and jerks the steer rather than drawing it. The horse's inside hind foot should be tracking up under its body and driving forward through each stride of the turn, which is what produces the forward energy that keeps the steer moving at a catchable rhythm. The head and neck should be soft and slightly flexed to the left, not cranked hard left with the nose pulled to the horse's shoulder, which creates a broken arc that loses body bend and drops the inside shoulder. From the rider's perspective, the correct corner feels like the horse is carrying itself through a consistent arc with forward impulsion — the rider is guiding rather than pulling, and the horse's energy is going forward and slightly left rather than being redirected hard left by rein pressure. The steer should be tracking in a smooth curve alongside and slightly ahead of the horse's inside shoulder, drawn into position by the horse's forward motion rather than pulled around by the rein. When the body position through the corner is correct, the heeler's job becomes significantly easier because the steer arrives in a predictable, rhythmic position with its hind feet swinging freely.