What does the veterinarian that examined her advise? What is her diagnosis? Her condition may have nothing to do with the food. If it is pruritus and an undefined skin condition, I would consider making an appointment with a veterinary dermatologist, since this has been going on for a year/4 seasons.
PS: Nutrisca salmon and chickpea is grain free/chicken free. It’s considered a limited ingredient food (check chewy dot com) however, if her allergies are environmental it won’t have much of an impact.
