Ear diseases are a common presentation in rabbits and rodents. Unfortunately, most of the time medical treatment is unrewarding. Depending on the location of the disease, the surgical technique could be challenging. After a theoretical presentation of 1 hour, participants will practice and learn for 3 hours how to perform otectomy, ear hematoma surgery, partial ear canal ablation, bulla osteotomy, myringotomy on rabbits, guinea pigs and rats. These techniques will be performed by the participants under the direct supervision of the lab instructors.