Category’s : BOXER
Boxer, breed of working dog, developed in Germany during the second half of 
  the 19th and early part of the 20th centuries from a number of breeds, principally 
  the bulldog and terrier types. The ancestors of the breed were originally used 
  for dogfighting and bull baiting; in later years, because of the courage, strength, 
  and agility of the boxer, it was selected for police work in Germany and was 
  used as a guide for the blind. Always faithful, intelligent, and alert, the 
  boxer makes a splendid pet. Among its physical characteristics are a massive 
  head; an undershot jaw; a muzzle with a characteristic black mask; ears that 
  are rather long and set high; dark-brown eyes; a broad, black nose; a strong, 
  round, and muscular neck; a deep chest; and well-muscled hindquarters. The dog 
  has a short, glossy, smooth coat that is any of various shades of fawn or brindle 
  in colour, sometimes with white markings. The male is from 56 to 61 cm (22 to 
  24 in) tall at the shoulders and weighs about 30 kg (66 lb); the female is from 
  53 to 58 cm (21 to 23 in) tall and weighs about 28 kg (62 lb). n4r4rm
  
 BULLDOG
  Bulldog, breed of dog, often used to represent the character of Britain and 
  the British. It was developed in England in the 13th century for courage and 
  ferocity needed in the sport of bull baiting. After bull baiting became illegal 
  in 1835, the dog was selectively bred to eliminate viciousness. The bulldog 
  has a heavy, thickset, low-slung body; a massive head; wide shoulders; short, 
  stout, and straight forelegs; long hind legs; and a fine-textured coat of short, 
  straight hair. It is also characterized by small, thin ears, located high on 
  the head; a large, broad nose; and a deep, broad, and full chest. The lower 
  jaw projects, enabling the dog to take a grip that is difficult to break. The 
  tail is short, straight, or screw, but not curled, and is hung low. The colour 
  of the dog may be red brindle, other brindles, or solid white. Mature male dogs 
  weigh about 25 kg (55 lb); females, about 21 kg (45 lb). North American bulldogs 
  are slightly lighter.
 
German Shepherd Dog
  German Shepherd Dog, breed of working dog, which originated in northern Europe 
  several centuries ago, hence their alternative (but unofficial) name Alsatian. 
  The dogs were originally used to protect flocks of sheep and are still used 
  for this purpose. More recently they have been trained to assist police forces 
  in capturing criminals and to guide the blind. German shepherds are also used 
  as guard dogs by the military. The dog is above medium size, standing 61 to 
  66 cm (24 to 26 in) tall at the shoulder. Males may weigh up to 41 kg (90 lb); 
  females are usually much lighter. It has a long, muscular body and gives an 
  impression of power and ruggedness. The dog has a long head; a wedge-shaped 
  muzzle; dark-brown eyes of medium size placed somewhat obliquely; medium-sized 
  ears, set high; short, compact feet with hard pads and dark nails; and a bushy 
  tail. The dog has a double coat, consisting of an outer coat with straight hairs 
  of medium length and a thick woolly undercoat. There are also long-coated varieties. 
  The colour may be any of many varieties between light grey and jet black; the 
  main colours are brindle, black and tan, tan, brown, and black. A white coat 
  is not acceptable in the breed standard. The German shepherd is noted for loyalty, 
  intelligence, and courage.
  ROTTWEILER
Rottweiler, breed of working dog, probably descended from a herding dog used 
  by the Roman armies to drive their cattle and to guard their camps. From the 
  early Middle Ages until the mid-19th century, drover dogs of this type were 
  used in southern Germany. They were especially connected with the market town 
  of Rottweil, hence their name. The breed was revived early in the 20th century 
  and used for police work. Rottweilers are fairly large, strongly built, and 
  intelligent, making excellent guard dogs. The short, coarse, flat hair is black, 
  with tan to dark brown markings. The tail is short and carried horizontally. 
  Males stand about 61 to 69 cm (24 to 27 in), females about 56 to 62.5 cm (22 
  to 25 in).
 
DOBERMANN PINSCHER
  Dobermann Pinscher, breed of working dog that originated in Apolda, Germany, 
  where it was first bred in about 1890 from the German shepherd dog, the Rottweiler, 
  the black and tan terrier, and the German pinscher. The Doberman (or Dobermann) 
  pinscher is named after its first breeder, Louis Dobermann, a watchman, who 
  developed the dog to help him with his guard duties. It was employed at first 
  as a watchdog and later was trained to act as a police dog and a war dog. Characteristics 
  of the breed are a powerful musculature; a wedge-shaped head; dark eyes ranging 
  from brown to black in colour and having an alert, courageous expression; a 
  well-muscled neck; and a smooth, hard, close-lying coat that is black, red, 
  fawn, or blue in colour. The male dog is about 65 to 70 cm (26 to 28 in) tall 
  at the shoulder and weighs from 32 to 34 kg (70 to 75 lb). Females are slightly 
  smaller.