Dog ear mites

Otodectic mites are tiny insects that live in the ear canals and feed by piercing the skin. They are highly contagious to both cats and dogs, but not to humans. Ear mites are the most common cause of ear symptoms in puppies and young adult dogs.

Ear mites should not be confused with the mites that cause sarcoptic mange. This is an entirely different disease, but one whose signs can also include crusty ears.