Which of the following is NOT a reason for disqualification in western pleasure?

The use of improper tack is not a reason for disqualification in western pleasure events. In western pleasure shows, horses are judged on their movement, manners, and responsiveness, so factors like excessive speed, faltering during movement, and the use of spurs forward of the cinch are directly related to how the horse performs and how it adheres to the expected standards of the discipline.

Improper tack, while it may reflect poorly on the rider's preparation or presentation, is not typically cited as a direct cause for disqualification in the same way that performance issues affect the horse's eligibility. In equine competitions, the emphasis is on the horse's ability to perform the class requirements under the rules of the discipline, including how it moves and interacts with its rider. Therefore, while tack choice is important for safety and presentation, it does not usually serve as a disqualifying factor on its own in this context.