Why is a steep croup objectionable on a horse?

A steep croup is objectionable on a horse because it can negatively impact the horse's balance, movement, and overall athletic performance. Horses with a steep croup often have difficulty achieving proper extension in their hindquarters, which is essential for effective propulsion and stride length. Additionally, this conformation can lead to increased strain on the back and hind limbs, potentially resulting in long-term soundness issues. Overall, a more level croup is generally preferred for optimal performance in various equestrian disciplines.