A cat's ears are sophisticated instruments — capable of detecting ultrasonic frequencies well beyond human hearing and rotating independently to locate sound sources. But this complex anatomy also creates vulnerabilities: ear infections, mite infestations, and foreign bodies can all cause significant discomfort and, if untreated, permanent damage.
Normal Ears
A healthy cat's ear canal is pale pink with minimal wax accumulation. A small amount of light-colored wax is normal. There should be no odor. The external ear (pinna) should be free of scabs, crusts, or bald patches. Cats with upright ears are less prone to ear problems than cats with folded ears (like Scottish Folds) or hairless ears (like Sphynx), whose ear anatomy traps more debris and wax.
Ear Mites
Ear mites (Otodectes cynotis) are tiny parasites that live in the ear canal and feed on skin debris. They are extremely common in kittens and outdoor cats but can affect cats of any age. The classic sign is a dry, dark, crumbly discharge that resembles coffee grounds — this is actually digested blood and ear debris from the mite feeding. Intense scratching at the ears and shaking of the head are common. Ear mites are treated with prescription acaracide medications applied to the ear or skin.
When to See the Vet
Any sign of ear discharge, odor, redness, swelling, excessive scratching, head shaking, or apparent hearing loss warrants veterinary examination. Chronic ear infections can cause the ear canal to become thickened and narrowed, making medication less effective. Some ear infections require cytology — examining a sample under the microscope — to identify whether the cause is bacterial, fungal (yeast), or mite-related, so the right treatment can be prescribed.