What Does It Mean If A Cats Tail Is Between Its Legs TikTok what does it mean when my cats tail and back muscles quiver like this? she always vibrates her tail at this exact spot very.. confused?? anyone else experienced this? : r cats Cat Tail Vibrating: Understanding Your Feline Friend's Movements 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