I would. You're gonna need something to knock out either a bacterial or yeast infection (or both maybe). How does it smell?
My coonhound Henry is somewhat prone to infection, but only in his left ear. I give him a squirt of cleanser to acidify that ear about once a week, but he does not like it. I also keep some topical antibacterial/antifungal handy in case it looks like it's getting bad.
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