corn can be a big problem for dogs.. who knew??? My moms dog has the corn allergy too. Also the groomer told her to feed him a tablespoon ( he is a small dog... bigger dogs might need more-- either way it can't hurt him) of Limburger cheese..... that cleared his hotspots right up.....( the groomer said it was the oil in it , so the fish oil someone else mentioned might work the same way?)