typically the recommendation for dust mite and pet allergy is decreasing exposure. for dust mites this would include washing the sheets in hot water once per week keeping his bedroom vacuumed and implementing dust mite encasements for the pillow boxspring and mattress. in regard to pet allergy whether to get rid of the animals is a personal/family decision. at the least keeping the animals out of the bedroom can decrease exposure. his allergist can make more specific recommendations in the context of the severity of your son's symptoms and test results.
my son's allergy test rast score was 642. he is allergic to dogs cats and dust mites. should i get rid of the dog?