The Boxer is a medium to large, short-haired breed of dog, developed in Germany. The coat is smooth and tight-fitting; colors are fawn, brindled, or white, with or without white markings. Boxers are brachycephalic (they have broad, short skulls), have a square muzzle, mandibular prognathism (an underbite), very strong jaws, and a powerful bite ideal for hanging on to large prey. The Boxer was bred from the Old English Bulldog and the now extinct Bullenbeisser which became extinct by crossbreeding rather than by a decadence of the breed. Boxers with white markings covering more than one-third of their coat – conventionally called 'white' Boxers – are neither albino nor rare; approximately 20–25% of all Boxers born are white. Genetically, these dogs are either fawn or brindle, with excessive white markings overlying the base coat color. According to Andrew H. Brace's Pet owner's guide to the Boxer, this theory is the least plausible explanation.
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