There are three whiskers on the dog's chin. These whiskers are called "sensory hairs". They are more sensitive than ordinary hairs and can feel small changes in the surrounding environment, such as the direction of the wind, smell, temperature, etc.

If a dog has three whiskers on its chin, it means that it is actually very common. Compared with a dog with one whisker, it is average. Unsurprisingly, compared with a dog with two beards, it looks very timid, so such a dog is not very outstanding.