yea , young my dog was on purina . i changed for orijen puppy formula ( large breed ) but finaly found out both had chicken in it and i was suspecting a chicken allergy since he was scratching way more since he was eating orijen . so i changed to six fish formula ... hes on it since 2 week , but still scratching , and bitting himself on the back / paws . but eyes/ears/lips seems ok ... i dont know maybe cause its dry and winter coat comming in ... i might change to Nutro allergic formula if he keeps scratching hardcore .. Nutro is good food ?