Why Do Cats Shake Or Vibrate Their Tails? What Does it Mean? she always vibrates her tail at this exact spot very.. confused?? anyone else experienced this? : r cats What is she trying to tell me? Vibrating tail??? : r CATHELP A cat's tail is a powerful form of communication that reveals its emotions and intentions. When the tail is erect and twitching, the cat is usually excited or happy, while a straight up Why Do Cats Vibrate Their Tail? This Is What They Might Be Signalling With It We Love Catz Why Do Cats Shake or Vibrate Their Tails? Vet Verified Reasons Explained Catster