Pitbull
Pit bull is an umbrella term for several types of dog believed to have descended from bull and terriers. In the United States, the term is usually considered to include the American Pit Bull Terrier, American Staffordshire Terrier, Staffordshire Bull Terrier, American Bully, and sometimes the Bull Terrier, along with any crossbred dog that shares certain physical characteristics with these breeds. In other countries, including the United Kingdom, the term is used specifically for the American Pit Bull Terrier, excluding the Staffordshire Bull Terrier. Most pit bull–type dogs descend from the British bull and terrier, a 19th-century dog-fighting type developed from crosses between the Old English Bulldog and the Old English Terrier.
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