Anyone else's cat do this? She vibrates her tail when she is happy to see me : r blackcats Quivering, Wagging, Puffed Up: What is Your Cat's Tail Trying to Tell You? What does it mean when a cat's tail vibrates? 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 Shake or Vibrate Their Tails? Vet Verified Reasons Explained Catster What is she trying to tell me? Vibrating tail??? : r CATHELP