Which area is NOT considered part of the horse's topline?

The correct answer is the crest, which is not considered part of the horse's topline. The topline of a horse refers to the area extending from the withers to the dock of the tail and includes the back, loin, and withers as integral parts of its structure. The withers are located at the highest point of the horse's back, while the back runs along the spine, and the loin connects the back to the croup. In contrast, the crest is the arched part of the neck and is primarily involved in the horse's overall profile and the appearance of the neck rather than being part of the topline itself.

Understanding the anatomy of the horse is crucial for evaluation purposes, particularly in contexts such as assessment for conformation, fitness, and overall health. Recognizing what constitutes the topline helps in identifying a horse's suitability for various disciplines and its potential performance capabilities.