A mixture of oatmeal and water can be rubbed onto the dog’s skin to help relieve dryness and soothe itchiness. The oatmeal should be left on the skin for approximately 10 minutes and then rinsed off with warm water. Baby food oatmeal makes a great, inexpensive soak.
The simple act of wiping the dog or cat down with a wet towel when they come in from outside can really help decrease percutaneous absorption of allergens.
Put all three in a spray bottle, and massage a small amount into the skin three times daily. Clearly, caution is indicated and veterinary supervision is a must.