Allergies can be really elusive

. What are you feeding exactly? Also, it can take up to 3 mths to see the true result of a new food.
If it is not food, and is atopy - then it is beneficial to find an oil that contains not just EPA and DHA (the fish oil), but also GLA. The one I found that meets these criteria is Ark Naturals Royal coat - contains fish oil, borage oil, and Vits A/D/E.