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To successfully treat your cocker spaniel's ear infection, you must administer the medications exactly as prescribed. For example, treat the ears for the full treatment course—do not stop treating the ears when they start looking better! If you stop the medication early, you may not completely kill the microorganism causing the infection, making a reinfection more likely.  If you are giving ear drops, use only the prescribed number of drops. Do not forget or skip any treatment doses. A missed or skipped dose could increase the likelihood of a reinfection. your cocker spaniel's ears properly. Cleaning your cocker spaniel's ears is essential to treating—and preventing—ear infections. To clean his ears, you will need a high-quality ear cleaning solution (available at your local pet store), and cotton balls or cotton gauze (available at your local pharmacy). Do not use a cotton swab—it will push debris down further in the ear and possibly damage the ear drum.  Lift the flap of one ear and squirt some ear cleaning solution in the ear, according to the label instructions. Gently massage the base of the ear for about 20 to 30 seconds, then wipe the ear dry with some cotton balls or gauze. Repeat with the other ear. Your cocker spaniel will probably want to shake his head after you put the solution in his ear. Let him do so.  Make sure the tip of the bottle does not touch your cocker spaniel's ears. Whatever is in his ears could contaminate the solution. Clean the ears 30 minutes before giving the medicated ear drops.  Do not clean his ears too frequently (once or twice week may be adequate). Overly frequent ear cleanings can cause ear infections. You may have heard about home remedies for cleaning a dog's ears, particularly homemade products containing vinegar. Do not use them! Home remedies and vinegar-based ear cleaning products can irritate the skin in your cocker spaniel's ears, causing swelling and an increase in secretions than can lead to infection.
Follow treatment instructions exactly. Clean Do not use irritating or homemade ear cleaning products.