One of my Cocker Spaniels has had chronic ear infections since she was born. The medication that seems to be most helpful is TRI-OTIC 15g. I have not been able to find this particular med. on this site. Can you get it for me? It used to be sold as CGB.
Try calling 1800-844-1427. Ask for Serita, she may be able to help you find this medication. Good luck, vetcare