Common Rabbit Postures, Behaviors, and Vocalizations Purring or tooth purringA sound made by lightly and quickly grinding and vibrating the teeth as the whiskers quiver; a sign of contentment. Oinking or honkingA Why is my rabbit vibrating and trembling like that? Every stomp tells a story! Sometimes it's a response to feeling unsafe, and other times it's a rabbit's very clear way of showing displeasure. Learning to read these little signals helps Why Do Rabbits Thump? Understanding Rabbit Thumping Behavior 10 Causes of Rabbit Shaking (and what to do to help them)