The best choice would be to see a board-certified veterinary dermatologist, if one is available near you (here is a list: http://www.acvd.org/).
Most dermatologists will not skin test for allergies until the dog has been suffering for 1 year/4 seasons. There are many other treatment options that she may respond to.
A summary of treatments for canine atopy:
Evidence-Based Canine Allergy Treatment
And here is a recent update:
Evidence Update- Evidence-based Canine Allergy Treatment
More info here:
http://www.2ndchance.info/allergytesting.htm
excerpt below from: http://www.2ndchance.info/Apoquel.htm
Food Allergies are probably over-diagnosed in dogs (they account for, perhaps 5-10%). Hypoallergenic diets are occasionally, but not frequently, helpful in canine atopy cases but you should always give them a try. Food intolerances are more common – but considerably more likely to result in digestive disturbances and diarrhea than in itching problems.
via search engine here: /forums/search/allergies/
Another site: http://www.allergydogcentral.com/category/allergy-stories/
