Whiskers serve as wind detectors, which, combined with the cat’s sense of smell, contribute to its swift perception of the source of any odor. This can be observed as an inquisitive cat twitches its whiskers as it sniffs while investigating.
Whiskers also help protect the cat’s eyes. A springing twig or a sharp blade of grass will touch the whiskers before catching the eye and trigger a protective eye blink. Whiskers fall out periodically to be replaced by new ones. The loss of whiskers can impair a cat’s motions and orientation to its surroundings. Never trim or cut off those whiskers.