However black dark brown or irregularly pigmented discharge in a cat s ears accompanied by a foul smell is a red flag to a health problem.
Cats ears smell sour.
If you clean them too often especially if they don t need it it can damage the ears health.
Cat ear infections like this are one of the most common reasons for vet visits for cats.
Ear infections often cause a cat s ears to become more red and swollen than do mite infestations and the discharge from an infected ear tends to have a distinctly foul odor.
A cat s ears have an amazing ability to clean themselves.
If the ears have a mild odor or look a little dirty moisten a cotton ball with a mild cleaning solution recommended by your veterinarian and wipe them out.
In a healthy cat the ears will have very little ear wax and the discharge will be a light brownish color.
The healthy discharge will have no smell and be accompanied by a pink clean inner ear canal.
They are not dangerous but they need to be treated before they get worse.
If your vet has ruled out ear mites the culprit in about half of all feline ear infections they ll have to do some sleuthing to figure out what s causing your cat s outer or middle ear.
Ear odor most feline ear infections also have odors associated with them.
Your cat s ears are the perfect place for a tiny ear mite to settle down and raise a family or a few dozen of them.
Musty smelling yeast infections sometimes develop when a cat has an allergy or other condition that alters the environment within the ear in a way that promotes the growth of yeast.
These parasites feed on the wax and oils in your cat s ears creating a brownish coffee ground like discharge that can give off a foul odor.