<P> In the United Kingdom, the breed standards are 55 lb (25 kg) for a male and 50 lb (23 kg) for a female . In the United States, a typical mature male weighs 50 lb (23 kg), while mature females weigh about 40 lb (18 kg). The BCA recommends the average weight of a bulldog to be 40--50 lb (18--23 kg). </P> <P> Bulldogs are one of the few breeds whose tail is naturally short and either straight or screwed and thus is not cut or docked as with some other breeds . A straight tail is a more desirable tail according to the breed standard set forth by the BCA if it is facing downward, not upwards . </P> <P> According to the American Kennel Club (AKC), a Bulldog's disposition should be "equable and kind, resolute, and courageous (not vicious or aggressive), and demeanor should be pacific and dignified . These attributes should be countenanced by the expression and behavior". </P> <P> Breeders have worked to reduce / remove aggression from these dogs . Most have a friendly, patient, but stubborn nature . Bulldogs are recognized as excellent family pets because of their tendency to form strong bonds with children . </P>

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