Understanding Your Cat's Vibrating Tail Behavior Why Do Cats Wag Their Tails? A Cat Trainer Explains Parade Pets Quivering, Wagging, Puffed Up: What is Your Cat's Tail Trying to Tell You? What Does It Mean When A Cat's Tail Vibrates? Cat Tail Vibrating: Understanding Your Feline Friend's Movements Anyone else's cat do this? She vibrates her tail when she is happy to see me : r blackcats