Pets with Ear Mites Jo had a restless night of listening to her dog shake her head. When she took Ruby to the veterinarian, the diagnosis was ear mites. Ear mites are little spiders that live deep in the ear canals of dogs and cats because of the warm and moist environment. Ear mites can come from other infected animals.
Ear mites look like coffee grounds on the outer ear.
If the problem is left untreated, it can cause serious problems. Ruby was treated easily and feels a mite bit better.