This article is from the Whippet Breed FAQ, written by firstname.lastname@example.org (Nancy Bennett).
Unlike many other breeds, the males are as easy to housebreak, and no
more aggressive than bitches. Both sexes make excellent pets. Males
tend to be slightly more loyal and enjoy repetitive play. Females can
be a little more complex and strong-willed, but are equally devoted
to their owners. Males tend to run one to two inches taller, and
three to six pounds heavier, than females.