@brutus77 Rosalie, are you sure it's not environmental? Blue did really well on a Salmon formula for about 6 months, then the itching and cysts came back.
I thought it was food for a long time, but we just did another allergy test and it turns out it's trees and grass. We're starting treatment Tuesday. Maybe something to look into? Our dermatologist Dr. Rada Panich also sees patients in Long Island (Plainview) at LIVS. She seems very knowledgeable. She also helped some bullies in my meet-up group.