For all those who are coping with skin problems that are potentially food-related:
A friend recently told me about the Nutriscan test,
for both dogs and cats, that you can run at home. From the Nutriscan web site:
"Since NutriScan is a salivary test, you have the convenience to complete the test at home or at your veterinarian’s office. Best of all, you and your veterinarian will have the NutriScan Report in approximately two weeks to discuss the best approach to address your pet's diet."
You can find out more on their web site:
http://www.nutriscan.org/