My three year old gerbil was tilting his head and scratching his ear all bloody two weeks ago. We took him to the vet the very next day, and they discovered he had mites. We treated him and the other gerbil in his enclosure, and he had eardrops to help his ear heal. It was looking a lot better, until the last day of that medication, which he was on for a week. All of the sudden on that last day he started scratching again, so we took him back again the very next day. They didn't find more mites, and said it was probably an inner ear infection, so I got an oral antibiotic to give him once a day for another week. Yesterday was his last day on that, and today he is tilting his head again, and can't seem to keep his balance. It doesn't look like he's scratching it again right now though. I know the vet mentioned how gerbils can get tumors in their ears. I was wondering if anyone knows if that's really what this could be. I am running out of money, and I can't keep taking him to the vet every week, as I haven't been successful in getting a job lately.