The Ultimate Guide to Cat Tail Language and Its Meanings Cats.com Cat Tail Language 101 Cats can communicate using just their tails! From playful wiggles to graceful curls, your cat's tail has a lot to say. Uncover the secrets of your feline Why Does My Cats Tail Vibrate 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 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