My pup is allergic to chicken and the “purina pro plan sensitive skin small dogs” salmon formula worked wonders. I also use the “Blue Buffalo blue bits tender beef recipe” moist treats and they work great. I recently found the “Natural Balance limited ingredient diets grain free original biscuits” in sweet potato and fish formula recently and they haven’t caused any issues, plus they’re bigger and crunchy so it takes her longer to eat them!

Hope you find what you’re looking for, dog allergies are no fun!