German shepherd dog

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I have a German shepherd which is 3 and a half years old.Since a year its been getting ear infections frequently, I've taken it to the vet and got it treated,yet the infection recurs.The last time vet said he would have to give anesthesia and clean the ears.Does anyone in mylot have a suggestion on an alternative method of treatment to rid my dog of this ear infection? I would be grateful if anybody in the know can help me with suggestions.