The Boxer is a breed of stocky, medium-sized, short-haired dogs developed in Germany. Their coat is smooth and tight-fitting; colors are fawn or brindled, with or without white markings, which may cover the entire body. Boxers are brachycephalic (they have broad, short skulls), and 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, and is part of the Molosser group.
Boxers were first exhibited in a dog show for St. Bernards in Munich in 1895, the first Boxer club being founded the next year. Based on 2012 American Kennel Club statistics, Boxers held steady as the seventh most popular breed of dog in the United States for the third consecutive year.
The head is the most distinctive feature of the Boxer. The breed standard dictates that it must be in perfect proportion to the body and above all it must never be too light. The greatest value is to be placed on the muzzle being of correct form and in absolute proportion to the skull. The length of the muzzle to the whole of the head should be a ratio of 1:3. Folds are always present from the root of the nose running downwards on both sides of the muzzle, and the tip of the nose should lie somewhat higher than the root of the muzzle. In addition a Boxer should be slightly prognathous, i.e., the lower jaw should protrude beyond the upper jaw and bend slightly upwards in what is commonly called an underbite or 'undershot bite'.
Source of information: http://en.wikipedia.org/wiki/Boxer_(dog)
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