Suggestions on food options for allergic dog?

[BluelineK9]

My 7 year old female has some food allergies. Switching to fish based protein has alleviated many of her skin issues except for one spot of stubborn itching on her left side at the anal glad area (our vet has checked and there does not seem to be anything going on there that would cause it) I would really like to clear that area up. She is currently eating Earthborn Holistics Ocean Fusion, which has some grains in it. I started to introduce Cal Natural Salmon grain free - but her itching appears to have increased I would love to switch both her and my 6 month old pup to raw, but it is not a possibility at this time due to storage constraints - but is a future goal...in the meantime, looking for any ideas?

[Gharrissc]

I primarily feed raw,but also supplement with Orijen6 fish. You may want to look into that food to see if it would fit your dog.