What Does it Mean When a Cat Wags Their Tail? Guide to Cat Tail Language Kinship You asked and we picked one question to answer this week: "Why does my cat shake her tail like a rattlesnake?", We've got the answer below from behavior professional Kenzie Korpela, IAABC SBA, CFVA. The Definitive Guide to Cat Behavior and Body Language Tuft & Paw Understanding the Purring of Cats Why Does My Cat's Tail Twitch? 6 Vet Reviewed Reasons Catster Cat behavior Wikipedia