TARRYTOWN, N.Y.—The flavor of the year at the Westminster Kennel Club dog show: Wasabi. A Pekingese named Wasabi won best in show Sunday night, notching a fifth-ever win for the unmistakable toy breed. A whippet named Bourbon repeated as runner-up. Waddling through a small-but-mighty turn in the ring, Wasabi nabbed U.S. dogdom’s most prestigious prize…

TARRYTOWN, N.Y.—Wasabi could be the flavor of the year at the Westminster Kennel Club dog show. Or it might have a taste for Bourbon. Dogdom heavyweights Bourbon the whippet, Wasabi the Pekingese and Striker the Samoyed are among finalists for Sunday’s best in show title, and they have plenty of competition: a French bulldog named Mathew,…