Hello! I am currently feeding Merrick BackCountry, but if Purina changes the formula I am going to change brands. It was hard enough finding one my dog did really well on.. does anyone know of any brands that have more than one flavor of dog food that is grain free, chicken, and egg free? No matter how any of them are processed, cooked, whatever, my dog reacts to them. Aside from Acana and Orijen, what else is out there?