CJ also has allergies. We know this because he has had continual diarrhea for the entire year or so he's been with us. I finally got sick of spending a ton of money on food that made no difference, so I bit the bullet and paid for the allergy test. See here for the results http://petoftheday.com/talk/showthre...hlight=allergy

Finally in January we started him on the Science Diet Z/D. Haven't heard of the DD.... We are finally starting to see results in the form of tootsie rolls. However, it must be noted that he is also on Prednisolone. The vet figured his intestines were inflamed and the Pred is an anti-inflammatory (sp?). Ever since he's been on the Pred, his vomiting has virtually stopped, and now with the Z/D we're getting tootsie rolls, so I'm hoping in time we can eliminate the Pred and just stick to the Z/D.

The only problem is, Peanut does NOT like the Z/D and will not eat it, even if I go a few days without giving her anything else (tried the old "she'll eat it if she gets hungry enough and she wouldn't! ), so now I have to figure out how to feed her - who has been free fed for her entire 17 years - without CJ getting his nose in the regular food. After a few days of tootsie rolls, we were negligent and he got in the regular food again and even though he only ate a little, the diarrhea returned immediately.

So, it's actually a good thing your vet suggested this diet first so you don't have to go through the trial and error routine I did. I actually sent an email to Science Diet to get their take on it. Here's their reply:
Dear Debbie :

Thank you for taking the time to contact us. We are delighted to help you today.

Most allergy experts agree that protein is what causes allergic reactions, not fat. Typically, peanut oil is not allergenic to peanut-sensitive individuals and that soybean oil is not allergenic to soybean-sensitive individuals.

Brewers rice and rice protein concentrate is white rice.

Attached is additional information on allergies you may find helpful. We would suggest speaking with your veterinarian for the appropriate food recommendation.

Comments from our customers are one of the most important sources we have for measuring the quality and acceptance of our products and the services we provide. If you have any further questions or comments, please do not hesitate to call our Consumer Affairs Department toll free at 1-800-445-5777 or revisit HillsPet.com.

Sincerely,

Hill's Pet Nutrition, Inc.
Consumer Affairs

I do believe this diet will help Brodie. Sounds like his allergies are worse/different from CJ's because CJ doesn't have any skin problems - just the diarrhea. The Z/D is expensive, but according to my vet, the long term complications of inflamed intestines and bowels are nothing you want to deal with, so what do we do but bite the bullet and give them what they need?

Good luck and let us know how it goes.