Why Is My Rabbit Shaking? Causes & Emergency Signs 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 Vibration? Is a Bunny purrs vibration? My lLop just started sitting on my lap & he vibrates shivers. And grinds his jaw. : r Rabbits Understanding Why Guinea Pigs Vibrate Our old bunny bacon did something weird yesterday. We were hanging out and his butt started vibrating VERY fast. Kept doing that as he stretched out. few seconds later he stopped and I was petting my bunny, just petting and holding his ears gently in my hand while stroking it, and he vibrated around his head area??? : r Rabbits