It sounds like your are getting plenty of good advice, getting a culture of the ear preferably before you clean it or attempt to medicate it would be the text book answer. This will usually save you time and $ in the long run by not having to backtrack and start over. However if we where stuck on desert island with no labs to run cultures (disclaimer) I would treat ears with Otomax or something like it, it has antibiotics, antifungal and anti-inflammatory components and will treat most ear problems (at least here in FL). Make sure you use a separate cleaning/drying solution on the ears couple of times a week, specially after a bath or dog gets wet. If his problem is generalized, chewing on feet, dry skin, ears maybe allergies are an issue. I am a believer in quality dog food have used caniday for my dogs for years and have seen general improvement on the dogs but it takes time. Sorry so long winded it is just a common problem for so many dog lovers. Let us know what the Vet says.. Great luck
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