Hi, try a low carb diet with no potatoes or sweet potatoes, my boy gets real itchy stinky ears when he eats kibbles with sweet potatoes, I prefer kibbles with rice as a lot of the grainfree kibbles have either potatoes, sweet potatoes & peas that are very high in starch…. The Earthborn Grain free kibbles (Large breed, Meadow Feast, Great Plains) has no potatoes or sweet potatoes they use Tapioca instead but does have peas… have you looked at Freeze dry foods like K9 Natural http://www.k9natural.com/
