Hi Lucky,
I would recommend switching Lucky to a grain-free diet since he might be allergic to a grain in the food. I would recomment:
-Nature's Variety Instinct
-Solid Gold
-Wellness Core (Jesse and I are waiting for the newest "Ocean" variety to come out)
-Innova EVO
Jesse had the itching skin problem, but it went away when I switched him to a grain-free diet. I hope this helps :)
~Heather and Jesse~