There are three mysterious ways of saying hello between dogs: 1. Licking each other’s mouths. Those who greet each other in this way are usually two dogs who have a good relationship; 2. Smell each other’s buttocks, because the dogs’ noses Very sensitive, they will recognize each other through smell; 3. Wagging their tails, dogs will express their emotions through their tails, so they will show goodwill by wagging their tails.

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In addition, dogs will also say hello by rubbing each other's heads and howling. Dogs also use their bodies to greet each other. At this time, the owner should not pull the dog away. They will separate after the dog finishes greeting. Dogs will also change the frequency and length of their barks to express their emotions, and dogs understand these barks.