Which of the following signs indicates that a horse may require re-shoeing?

A horse may require re-shoeing when there is visible wear on the outer edge of the shoe. This wear can affect the horse's balance, grip, and overall comfort while moving. Regular inspection of a horse's shoes is important for maintaining hoof health and ensuring that the horse is protected from injuries and discomfort that could arise from shoes that are worn down or improperly fitted.

While increased hoof growth is a natural occurrence and can signify healthy hoof care, it does not directly indicate the need for re-shoeing. A soft and shiny coat reflects general health and grooming, but it is unrelated to hoof care. Additionally, a stable and consistent gait suggests that the horse is moving well, which may not necessarily indicate a need for new shoes. Recognizing visible signs of wear is critical for equestrians to manage their horse's hoof care effectively.