My dog also had a problem with itchy skin. Having addressed a vet, I found out that she had seborrheic dermatitis due to allergy. Because of this disorder, the skin became scaly, flaky, itchy, and red, and affected the back, face, and flanks. Since that time I've been buying Dechra MalAcetic Shampoo at Pet Pharmacy and pay attention to my dog's nutrition. She is doing fine now.