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I would not recommend that you use tylenol at any strength in a puppy of this age. Ear mites and the secondary infections with bacteria and/or yeast that occur because of the inflammation need ear medications designed to treat these kind of infections and decrease the inflammatory response. These would need to be prescribed by your veterinarian. Ear infections can be very painful, and I would not continue to use the vinegar as it most likely burn when it contacts those inflammed ears. Your best course of action would be to have your veterinarian prescribe the appropriate medication for the ears plus/minus additional pain medication for a pup of that age.
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