I have a Standard Poodle that has had cronic severe ear infections for 10 years. He had the problem before I got him. I have had him to the vet numerous times and have tried several different vets. None of the vets have been able to heal him. The vet that has worked with him the longest says that it is most likely an allergic reaction to something, to what she doesn’t know. I have tried several different kinds of grain free foods, but no improvement. At times his ears smell really bad, there is a dark brown discahrge and his ears will bleed sometimes when I am cleaning them. He scratches and shakes his head often.