How old is she and how long has it been going on? Where, specifically, does she itch? Have you checked thoroughly in her ears, armpits, tummy, between her toes - just to make sure there is nothing add'l going on?
Most importantly what exactly are you feeding? Out of all the meats, chicken is generally the most allergenic - but depending on what else is in the food (CORN etc.), it could be many other obvious additives...
