We have the same problem with our dachsund's ears. She has been to the vet three times...we wash the ears out as directed and used the ear drops twice for seven days each time and this poor dog still has problems. The ears smell and a black wax type stuff keeps returning. Suggestions?
A culture and sensitivity of the ear should be done to determine what is growing in the ear and best form of treatment. I always recommend that you treat the ear for 3 weeks and keep medicne around the house for when flare up occur. If the cartilage is hardened then surgery may be an option. vetcare