What were Miniature Bull Terriers bred for?

Miniature Bull Terriers were bred in the 19th century for ratting, and their strong, muscular, but compact build made them highly adept at this task. Today, they are primarily bred as loyal companions, known for their playful, energetic, and charming personalities. While their days as working dogs are mostly behind them, they excel in a number of dog sports and are loved for their spirited and affectionate nature.