Hi,Veterinary dermatologists test dogs for a variety of allergens, including cat and human dander, trees, molds, house dust, dust mites, fleas, grasses and household synthetics.o, the allergy testing shows a total of 7 allergens to which she responded with an allergic reaction (the human dander being the highest). I believe that if there are more than 3 or 4 allergens contributing to the allergy, it is very unlikely that desensitization will be effective.
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