20 surprising cat facts you've never heard before Cat tail signs: What your cat's tail tells you 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. Why Do Cats Shake Or Vibrate Their Tails? What Does it Mean? Cat tail signs: What your cat's tail tells you Why Do Cats Vibrate Their Tails? Reading Your Cat's Body Language Kinship