Pit bull is a generic name that describes several breeds known for their flat heads, short coats and appearance of strength including American pit bull terrier, American Staffordshire terrier and Staffordshire bull terrier.

These are standards of two of the breeds. Others are similar.

History: The dogs were bred in the early 19th century as a cross between bulldogs and terriers. Originally bred as bull baiting dogs and later bred to fight each other in rings. Came to the United States in the mid-1800s.

Temperament: Courageous. Zest for life. Eager to please. Pit bulls were originally bred to have a high threshold of pain, and a low threshold of aggression against other dogs. Any dog that was human aggressive was culled and never bred.

Weight: Between 35 and 60 pounds depending on gender.

Height: 17 to 19 inches tall depending on gender.

Coloring: Nearly 20 colors and nine markings.

Coat: Short, glossy.

Source: American Kennel Club, United Kennel Club