I think their diet plays a major role, allergens in the food causing leaky gut, systemic inflammation and the skin issues you see. So treat the patient - after changing diet, improve gut flora (fermented dog treats :), heal the gut mucosa - Turmeric, Cats Claw, Gotu Kola, Sarsaparilla, Plantain, Calendula, Myrrh, etc, inhibit hyper immune response - immune amphoterics (Astragalus, Reishi, Cats Claw, Maitake, Licorice, etc) and immune-regulatory herbs (Gotu Kola, Sarsaparilla, unprocessed Rehmannia, Turmeric,Guduchi, Baikal Skullcap, Boswellia, etc), other anti-inflammatories - Amla, Goji Berry, Bromelain, Quercitin). In my experience this type of treatment takes a minimum of 6 -9 months and it may control the issue but often does not cure it. Atopy is genetic and often induced by prenatal exposure to compounds that the mother ingests, breaths in or gets treated with.