First of all observe your cat for scratching, as the bites can be very irritating and cause their ears to become very sensitive and itchy. You may also notice minor skin irriations around the ear, or your cat shaking it's head before and after scratching to attempt to free herself from the mites. Next gently rub the outside of the lower ear canal. If this prompts an automatic scratch response this indicates ear mites. Next examine the hears with a flashlight, if you see small granular substance simular to coffee grounds there is a presence of mites. Clean the ears to provide immediate relief from the infestation by using something like Dr. Gold's Ear Therapy to help sooth the irritation. Your cat's first instinct is to shake his head. Holding him close and rubbing gently will prevent him from shaking the oil free before it has a chance to loosen mite debris. Clean the residue with a clean cotton ball or swab, but do not insert the swab into the ear canal. You may damage your cat's ear. Finally treat the ears, generally with a mixture of 1/2 ounce of almond oil and 400IU's of vitamin E. Massage ears, make sure liquid is room temperature, and repeat daily for one week and then let them rest for three days. Repeat whole process as necessary to keep your cats ears in proper health!