Food allergies only account for around 10% of dog allergies. But, even if a dog has enviro allergies, it can be beneficial to have them on a quality food that has lower common allergens.
Where is she itching and for how long? Go to pollen.com and check your zip code...notice what pollens are present. I have pollen.com email me daily so I can see what current pollens are in the air here bc both Wylie and Marcel have issues w/ certain pollens.
Here is a way to approach allergies - so much good info (I didn't write this, it's culled from other places):
http://www.yorkietalk.com/forums/die...tart-here.html