[Little mama]

Allie has been "diagnosed" with environmental allergies. Vet derm. prescribed Atopica. I have not been giving it to her everyday because sonetimes it makes her sick, some days it doesn't. I took her to her regular vet this afternoon because she is itching soooo bad. He gave her predisone to take with a meal then 2 hours later the med. He suggested that I feed her a "white fish" food. I went to the store and all they had were salmon type food. I thought I read somewhere about a white fish type food. She is currently on natures variety lamb or venison. From everything I've read those are better for allergy dogs, I have not tried duck, but I did buy a bag of stella and chewy dehydrated surf and turf. I crumbled 1/4 of a patty and sprinkled it on top of her venison.
I guess my question is does someone make a white fish food, (I prefer raw, she just seems to like it better than kibble.) But I'm not against feeding her kibble if it helps but if she likes the salmon would that be a better choice than the lamb or venison?.

Thanks for listening,
Janet