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If you want to threaten, then pulls up her lips and shows his teeth. Timid dog who is aggressive at the same time, embraces the tail and puts his ears. Note, if you will not be able to unload, it will soon invade! Inviting the dog to play falls on the front legs to the ground, lifts the buttocks, waving a friendly upright, but a loose tail and bark encouragingly. A dog that is subjected to, falls to the ground, to give up less. A dog that is completely subjected, rolling over on its back and tail between thigh.  Optical signals, such as body posture and tail, setting the ears and facial expressions play a significant role in the dog's speech. Equally important - if not more important - means of expression, our pet dogs are issued by the voices and the smells left by the dog. Body language To actually be able to understand what the dog wants to express, first of all need to observe the mutual arrangement of the head, torso and tail. When the dog wants to impress someone, or threaten, it seeks primarily to give as much as possible. Takes on the upright legs, with highly raised, trembling slightly at the end of the tail just before his rival, the head is turned slightly to the side, and the ears carefully tuned to the front. Threatening behavior can be divided into aggressive. If a dog threatens to attack it while growling or even barking, his body is tense and bristling hair, the tail is raised high above his head, and all tight, the head is slightly tilted, ears clearly inclined toward the front, and his teeth completely uncovered. When in the event of uncertainty or fear of light, the dog tries to look smaller than it is in reality, the legs are slightly bent, the tail is lowered, and ears backwards. If your dog wants to be the enemy, it clearly begins crook, leaving his head between the shoulders. When exposed to passive dog can even lie on the ground and slowly crawl towards the dominant rival. The tail is nestled between the legs, ears are rearward, the dog licks nervously and can  like a puppy. When exposed to an active posture, it is true also points to surrender, but the dog looks a bit more comfortable, and the tail is kept neutral - neither raised nor pressed between the legs. This behavior is often seen at a meeting of the dog owner has a dog, but not excessively, and it turns its subject, but it is not unconditional obedience demonstration. Face of a dog has many possibilities of expression, signal dog's mental status by the arrangement of eyes, ears and lips. When the dog feels fear or anger, his eyes are declining, and increasing, when the dog seen something interesting or enjoyable. To show their dominance, the dog stares stubbornly to his rival, trying to force him to reverse the vision, which is a testimony to withdraw from the competition, fear, uncertainty or surrender. Ears keenly tuned towards the front marked by - depending on the circumstances and attitudes of the rest of the body - an interest in, or threatening behavior, while the ears rearward or to the side show to submit to fear or uncertainty. Unveiling of the teeth is always a sign of impending. Sounds Dogs are familiar with and able to make various sounds they know how to bark, howl, growl or squeak. Mainly bark when they want to warn (and thus to alert the rest of the herd), but also with joy when the owner returns home, when invited to play with the dog when the dog hunts or when it is on the trail. Howling in turn naturally meant the determination of its territory, to deter others from its violations of flocks and herds of the collection in one place (because domestic dogs that have long kept the same, often howl, expressing his loneliness and called its owner, so As in nature other members of the flock). Squeaking and whining are issued by the puppies - and later adult dogs - as a clear signal of discomfort or pain, and sometimes - impatience. Snarl is threatening behavior, but more often associated with a sense of uncertainty and fear than with a sense of power and domination. The dog is not sure of his superiority growls. Perfume Dogs can also keep some messages with urine or faces, or rather their scents. In this way, provided information on the size, nature and frequency of stay in the area of the dog. Perfume also play a significant role in the direct contact of dogs - often seen as the dogs sniff the snout, but also around the genitals and anus. Dominant dogs were less likely to agree to their careful by another dog, while the dogs tend to be the presentation of his 'palette smells'. Unwanted messages Dogs in their behavior often betrays far more than their mental states would like - the best example here would be to compare behavior two young dogs, sighted for the first time. Less self-confident dog always loses the first establishment of the hierarchy, even though he was physically stronger - the rivalry is resolved at the level of psychological predispositions rather than physical superiority. Mutual prying up Because the dog and man live side by side for generations, and so learned to each other not only read their signals, but make them in a manner comprehensible to the other. The simplest example is the inclination of the head by a dog when he tries to understand something - this behavior acquired during intercourse with a man. The man also learned to something from the dog, as well you can see, when man tries to encourage your pet to play with, usually leans forward, squat or kneel, or even conspicuously transgress from foot to foot. Exactly the same gestures performed by a dog, to encourage another dog to play with - the only exception here is his hands on the thigh, the action which the dog, unfortunately, is not able to repeat.