Gizmo has allergies and was very itchy for a little bit. My husband and I ended up getting the duct work cleaned in the house, this helped him and us. Also, Gizmo had more sensative skin, and the holistic vet that I talked to recommended a few different foods to try him on. One of them my Carin is on (Innova Dry) and Giz always seems to make a bee-line for her food. It's not that Giz was allergic to any of the foods, but I was told that some help the skin and coat a little bit more.
I started feeding this to my Cairn via recommendation from her grommer/stripper who noticed he skin was red. I put her on Innova and her skin as improved.
So, Giz and Maizey are both on it and Giz is itching less.
I'm not a vet, but it seemed to work to Giz who itched and nibbled.
Good luck!