Dog body covered with hair, head, neck, body, tail and limbs. The front end is the head, the eyes for the sector can be divided into frontal and facial, forehead is relatively short, on top of the head, with well-developedbrain. The face of long, forward projecting into the nose.A dog's nose is very long, accounting for about 2 / 3 ofthe face, nasal olfactory nerve olfactory cells verydeveloped, densely covered in the nasal cavity, sense of smell is very sensitive, and its sensitivity was measured tomore than 1200 times higher olfactory sensitivity of human. The nose is very long, is beneficial to theanalysis and identification of air fine smell. The nose on both sides of a hard long haired, with tactile organ function. The forehead on both sides of a ears to, usuallyshort and upright, but also some large drooping. The earis composed of cartilage, soft and flexible, and can rotate with sonic orientation, there is a close relationship between the clever and hearing dogs, dogs very sensitivehearing, far more than the human hearing, can hear the sound frequency is 55000 hz. But the dog's eyesight is weak, each eye individually vision, vision is only 20 to 30meters, the dog's eyes is blind, the resolution that color isincapable of action. The dog's neck is long, raised in thefront torso, free and flexible rotation.