My golden retriever continually has problems with one of her ears. I
used some homeopathic drops for humans, not much help.
Well, now it is time for medication. Your dog needs to be seen by a vet and the appropriate antibiotic will be given. This could be a yeast or a bacterial infection. Another possibility is a polyp or foreign body in the ear. Ear infections are a common problem in dogs. Good luck, vetcare