Dogs have whiskers, also known as vibrissae, which are specialized hairs that grow above their eyes and on their cheeks, muzzle, and chin. Here are some of the functions of whiskers for dogs:

• Sensing the environment: Whiskers help dogs navigate their environment by providing additional sensory input, much like antennae on insects. They can detect the size, shape, and speed of nearby objects based on the movement of air currents. Whiskers in different areas give a dog specific information about their surroundings.

• Early warning device: Whiskers serve as an early warning device that something is near the face and thus helps the dog prevent colliding with walls or objects and alerts the dog that something is approaching which might damage his face or eyes. They are so sensitive that they also register slight changes in air currents.

• Conveying emotions: Whiskers can communicate emotions. For example, when a dog is relaxed, their whiskers will be in a neutral position. When they are alert or excited, their whiskers will be forward.

• Preventing dogs from getting into jams: As a dog approaches a narrow spot in the fence, a slender space between rocks, or a small area between the living room chairs, whiskers can help dogs determine if they can fit through a passage without getting stuck.

In summary, whiskers are an important sensory tool for dogs that help them navigate their environment, avoid collisions, and communicate emotions.