We have a 2 year old English Bulldog who has crusts on the edge of his ears. He seems to have mild seasonal allergies and we give him Zyrtec for this. The crusts on the ears do not seem to change with the seasons. He eats ZiwiPeak Lamb and does very well on it - no tear stains at all. Does anyone know what might be causing the ear crusts? You can barely see them, but you can feel them. Of course he has been to the vet, and does not have mange and the vet has no idea what is causing this. Thanks!