[anonymous]

Okay, so the blood test.

Intradermal skin testing done by a veterinary dermatologist is the most accurate way to test for environmental allergies.

I suspect the test you had done detects sensitivities and not true allergies.
Check with your vet.

Per the search engine: http://www.nevetdermatology.com/canine-atopic-dermatitis-treatment/
/forums/topic/allergies-and-itchy-dogs/
http://skeptvet.com/Blog/?s=allergies