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2. Pit Bull

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This breed blends the terrier’s energy and agility with the bulldog’s strength and build. Some experts say rising pit bull incidents track with the breed’s growing popularity. Pit bulls were bred for fighting and are often mistreated or restrained. With proper care, this intelligent breed can be social and playful. PETA notes fatal incidents often involve pit bulls suffering widespread, ongoing abuse and neglect, which may explain their frequent link to severe injuries or deaths.