Cat Tail Language: Common Positions & What They Mean What does it mean when a cat vibrates its tail? The Definitive Guide to Cat Behavior and Body Language Tuft & Paw Why does my cat shake her tail like this? : r cats Why Is My Cat's Tail Twitching? Is This Normal? Chewy Rattlesnake Tail is one of the signs of the *most* excited happy cats. It can be confused with the behavior of spraying, but in a fixed cat, its actually just an extremely excited cat!!!!! #happycat