We've had our fun times with ear problems. We found that feeding a 0% grain food will solve it, (we do Taste of the Wild Salmon). Even a single piece of bread and my boy will get an ear infection, within a day. When we were first battling ear problems, we did use a perscription RX (I'm sorry don't know which one), perhaps just to get it under control. BUt the diet has worked since then. We do also give organic yogurt for probiotics, I know that helps human children avoid ear infections and colds, so I figure it surely helps the fur babies too in that regard.
GL