food allergy? please help!

hi everyone,
I recently posted about my boy who had diarreha and vomited after I tried a new food on him. well for the the 9 months I've had him he has had very itchy ears and head, tons of ear wax, gas, and his stools are light colored and stinky. I'm convinced it's because of a food allergy to either chicken or grains. are those common food allergy symptoms? I just want to fiND something he can eat because he is so itchy I feel bad. he was in the vet about a month ago and was very healthy, blood test show eosinophils were a bit high, that was all, and I know those can point to an alkergy, anyone have experience with food allergies? I really don't know if it's worth it to go to the vet or if I should do a food trial on my own?

I know there are commerically available limited ingredient foods that are suitable for cats with food allergies or sensitivities.

Nature's Variety Instinct Limited Ingredient

Blue Buffalo Basics

Merrick Limited Ingredient

Natural Balance Limited Ingredient

There's a lengthy TCS thread with suggestions of novel protein foods that may be helpful to cats with allergies to common proteins like chicken: http://www.thecatsite.com/t/306947/your-favorite-brands-of-novel-protein-canned-cat-food

Some people fnd that a raw or home cooked diet works best for their cat with food allergies or sensivities because it's easy to eliminate ingredients one by one to see what the trigger is.

Itchy skin and gassiness can be symptoms of a food allergy or sensitivity. I found this thread that you may find helpful: http://www.thecatsite.com/t/327373/starting-cat-on-an-elimination-diet-due-to-suspected-food-allergy

Yep I agree with @LTS3  the best way to try and control the allergy is a limited ingredients wet food, or ideally moving towards homecooked or raw. Kibble is loaded with grains and things cats not only can't digest but can easily develop allergies to. Many times cats don't actually have an allergy to a protein, but to something IN foods, and moving towards higher quality more pure foods can fix the issue.