I would see a veterinary dermatologist and consider doing the allergy testing.
As antihistamines have not worked the Atopica might be a choice to use while continuing to try to find the cause of the problem.
You can read about food allergies here
http://www.marvistavet.com/html/food_allergies.html
As most of the prescription diets contain preservatives and grains that may make allergy issues worse I'd suggest trying a minimal ingredient food like California Natural Lamb, a grain free food like Innova Evo, or an alternative formula food such as Eagle or Wellness rabbit, duck, venison, or fish diets.
These foods are also careful about preservatives which can be an issue in some dogs.
Make sure to review his treats too as they can trigger allergies. I've known of dogs who had a problem with their heartworm med because it was in a flavor treat and swapping to a different med helped them.
If you have a cedar bed for him try getting rid of it. Many animals are irritated by the cedar oils. Wool blankets can be an issue too.
Look at the things you use in the home - enzyme based detergents, scent dispensers, carpet cleaners - things the dog comes in contact with all the time and consider changing those to see if that helps.
I think if with all the vets you have seen you have not seen a veterinary dermatologist you should try that.
Oh and sometimes in the rescue danes I've had over the years skin issues cleared up when we wormed using Panacur - apparently even a light infestation of worms such as whipworms can seriously impact skin and coat.
Hope this helps you!
Edited by NHolmes on April 24 2006 at 11:00am
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