[Anonymous]

Has she been tested for environmental allergies (skin testing done by a dermatologist).
If this has been going on for 1 year/4 seasons without any significant periods of relief despite diet changes, baths etc. If the dog is experiencing distress and discomfort, that is how I would proceed.
Here is one thread: /forums/topic/help-7/ and another one: /forums/topic/possible-food-allergies/
Best of luck.