Why Do Rabbits Thump? Hi all, so just a question here. Ive noticed Luna do this a few different times and Darcy do it once that Ive seen. I dont know if this is something I should be concerned about? When I first saw it Reading Your Rabbit's Behavior 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 Understanding Rabbit Thumping Behavior