Decode your cat's mood instantly! Is your cat's tail a question mark, a low swish, or an excited high wag? Each position has a secret message Why does my cat shake its tail like this? : r cats What does this tail shake say? : r cats Cat Tail Twitching: What Does it Mean? Whitney Veterinary Hospital Why Do Cats Shake Or Vibrate Their Tails? What Does it Mean? What is she trying to tell me? Vibrating tail??? : r CATHELP