Definition: The crest is the topline of the neck. Ideally the crest should be a gentle convex curve from the poll to the withers. On a very fat horse the crest can be very thick, and almost seem to flop over. On a very thin horse the crest will be straight and thin. Some breeds like Morgans, Arabians, some warmbloods and draft horses and ponies have a more distinctively crest than breeds like Quarter Horses and Thoroughbreds.
The crest on the fat horse was arched and thick.