Ear mites are the most widespread mite that infests dogs and they are very transmittable, easily spreading from dog to dog or other animal to dog.
Ear mites are little crab-like parasites that reside in the ear canals and head of dogs, and despite the name, they can also sometimes be found throughout a dog's coat and skin. There can be thousands of mites inside of a Yorkie’s ear.
They begin by living on the surface of the dog’s ear canal. Different than fleas, they do not prick the skin or suck the dog’s blood. It is usually starting in a dog's ear that they eat the tiny amounts of a skin tissue and ear fluid. As time goes by, they can travel
to the dog’s back, neck and all over the body.
Mites have 4 phases to their life cycle. They are hard to get rid of because even though the adults will die off within 4 weeks, mites in other stages will be on the dog and will rapidly be maturing into more adults that will eat away at tissue.
If a Yorkie does have mites, you can be sure that they are present in all for growth cycles: