Vitamin E and oatmeal are natural treatments for dry skin on a dog, states PetMD. Application of these treatments prevents irritation and reduces scratching. HowStuffWorks adds that dogs with dry skin should be bathed as little as possible with only a moisturizing shampoo made for dogs.
Massaging vitamin E oil directly into a dog's skin or adding vitamin E to bathwater treats dry skin, according to PetMD. A veterinarian consultation is necessary when administering vitamin E in pill form to avoid exceeding the recommended dosage.
Both PetMD and HowStuffWorks recommend warm water baths mixed with oatmeal to remedy dry skin. HowStuffWorks also suggests that dog owners try applying tea tree or fish oil to the skin.