<Tr> <Th> UKC </Th> <Td> Terriers </Td> <Td> standard </Td> </Tr> <Tr> <Td_colspan="2"> Domestic dog (Canis lupus familiaris) </Td> </Tr> <P> The Bull Terrier is a breed of dog in the terrier family . There is also a miniature version of this breed which is officially known as the Miniature Bull Terrier . </P> <P> The Bull Terrier's most recognizable feature is its head, described as' shark - head - shaped' (sometimes confused with egg - shaped) when viewed from the front; the top of the skull is almost flat . The profile curves gently downwards from the top of the skull to the tip of the nose, which is black and bent downwards at the tip, with well developed nostrils . The under - jaw is deep and strong . The unique triangular eyes are small, dark, and deep - set . Bull Terriers are the only dogs that have triangular eyes . The body is full and round, with strong, muscular shoulders . The tail is carried horizontally . They are either white, red, fawn, black, brindle, or a combination of these. Their unusually low center of gravity makes it hard for opponents to knock it down . </P>

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