The German Shepherd Dog is well proportioned and very strong. The GSD has a sturdy, muscular, slightly elongated body with a light, solid bone structure. The head should be in proportion to its body, and the forehead a little rounded. The nose is most often black however, blue or liver still do sometimes occur, but is considered a fault and can not be shown. The teeth meet in a strong scissors bite. The dark eyes are almond-shaped, and never protruding. The ears are wide at the base, pointed, upright, and turned forward. The ears of puppies under six months may droop slightly. The bushy tail reaches almost to its hocks and hangs down when the dog is at rest. The front legs and shoulders are muscular and the thighs are thick and sturdy. The round feet have very hard soles. There are three varieties of the German Shepherd: rough-coated, long rough-coated, and the long-haired. The coat most often comes in black with tan, sable or all black, but also can come in blue, liver and white, but those colors are considered a fault according to most standards. White is not an acceptable color for the German Shepherd, however they are now being recognized as a separate breed, called the American White Shepherd. A piebald color has also occured in a single GSD bloodline which are now being called Panda Shepherds. A Panda is 35% white, the remainder of color is black and tan, and has no white German Shepherds in its ancestry.