2. Ear mites are common ear canal parasites in cats, and at the beginning of the disease, cats will appear to scratch with their hands, and the brown discharge is caused by a mixture of ear oil, blood, and inflammatory secretions, and in the later stages of the disease, cats will have infections in the head and face.

3. It is recommended that owners take their cats to the veterinary hospital in a timely manner and use medication to flush and disinfect the cat's ear canal.