It is a good idea to have your veterinarian regularly examine your pet's ears. If an ear mite infestation is ignored it will almost always be followed by a bacterial infection because the bacteria find easy access to living tissue through the holes left by the mites. Such an infection can spread deep into the ear and eventually penetrate the brain causing convulsions and death. Ear mites are very irritating. They often cause the animal to scratch to the point where it tears out all of the hair and creates bleeding sores around the ears.
Scratching can result in reinfestation with mites from the paw or tail.
Consult your veterinarian about methods for treating infested animals.