Dog Ear Injury. They can happen in a number of ways, though they’re most often caused by infections. While these injuries can certainly cause an ear hematoma in dogs, the most common ear trauma is violent head shaking.
Ear injuries can bleed excessively, so working quickly in bandaging the ear prevents further injury and gives time for the wound to properly heal. It can take weeks or longer to get an ear injury to heal because of the persistent ear flapping. Either playing with another dog, violently/repetitively shaking their head due to an ear infection, striking their ear tip on a hard object while shaking their head or the like.