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 Cat Tail Meanings TrustedHousesitters.com Anyone else's cat do this? She vibrates her tail when she is happy to see me she always vibrates her tail at this exact spot very.. confused?? anyone else experienced this? : r cats Why Do Cats Shake or Vibrate Their Tails? Vet Verified Reasons Explained Catster Your cat's tail is talking are you listening? From flicks of frustration to swishes of overstimulation, tails can reveal so much about how your cat is feeling. #cats #catbehavior #bodylanguage