My Hugo are skin sensitive after i read this link than i change his dry dog food after that his skin allergic are totally under control.
Here are some brand u can consider : Eagle Pack Holistic Select, California Natural, Nutriedge, Natural Balance, Innova. Above all brand of dog food are without corn, wheat, glutens, dairy or soy.
Note: Some brand the taste are not good my Hugo & MiuMiu don't like to eat, currenlty i feed them California Natural - Herring fish & potato before that is Innova - Chicken & Turky. Innova they already eat for 7 months so i change.