Not only home check, periodical vet checked as well. I posted a case of aural hematoma before in the Health n Diseases section. Do include ear mite drops as well when you clean your cat's ears especially if your cats are exposed to the outside.

Ginger is an indoor cat, even with his ears cleaned once a week (without the ear mite drops), he still had it. Only assumptions can be made as to how he got ear mites in his ears. For those of us who are not at home for long hours, you'll never know if your cat has been shaking his head or scratching his ears excessively. So, put some drops whenever you clean to avoid problems. Then don't forget your routine vet visits as well.

wooz....