Dog whiskers, also known as vibrissae, are specialized hairs that grow above a dogs eyes and on their cheeks, muzzle, and chin. They are different from most other hairs on a dogs body because they are considerably more rigid and embedded more deeply into the skin. At the base of each vibrissa is a high concentration of touch-sensitive neurons so that the slightest pressure on that stiff hair will produce a neural response. Here are some functions of dog whiskers:

• Sensory perception: Whiskers are more sensitive than regular hairs because the follicles from which they originate are packed with blood vessels and nerves. They are specifically tuned sensory equipment that guide a dog through daily activities. These specialized hairs aid vision and help a dog navigate its environment by providing additional sensory input, much like antennae on insects.

• Early warning device: The vibrissae 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 its face or eyes.

• Assist with swimming: Whiskers can also help dogs navigate in water by detecting changes in water currents.

• Communication: Dog whiskers can also communicate emotions, such as happiness or anxiety when a dog is in a stressful situation.

• Hunting: Whiskers aid with hunting by helping dogs detect the size, shape, and speed of nearby objects based on the movement of air currents.

• Determining the size of objects: Whiskers can help dogs determine if they can fit through a passage without getting stuck or turning over furniture.

It is important to note that whiskers are very sensitive and should not be cut or trimmed unless it is necessary for medical reasons.