Dust mites are everywhere there is dust. I think of them only living on dust and perhaps creating an airborne dustiness that affects the respiratory system but not affecting the skin.
Assuming the Revolution had its full potency and was not "defective" and you are not also seeing signs of a possible fungal infection ( http://www.guinealynx.info/fungus.html ), I would move toward considering this dry skin and find some hypoallergenic creams that might help. Start first with cold pressed coconut oil.
For humans, a product called Cetaphil is useful.
Looking around at Amazon*, here is what I mean by Cold Pressed Coconut oil
This is the Cetaphil I was referring to: Cetaphil Products
I also see products like this that might possibly help. Lots of positive reviews:
Wild Naturals Eczema Psoriasis Cream - for Dry, Irritated Skin, Itch Relief, Dermatitis, Rosacea, and Shingles. Natural 15-in-1 Formula Promotes Healing and Calms Redness, Rash and Itching Fast
This is assuming the Revolution worked and there is no fungal or bacterial infection (and no open sores).