I have two shelties but only one has a skin problem. My sheltie has lost some hair at the top of her ears. Her skin is very itchy and she will dig/chew herself open. The vet has looked at her numerous times, a scraping of her skin to check for fungus and also we have tried steroids, which did help a little. We are giving her fish oil, which seems to help some. Have also tried selsun blue shampoo which did not help. We live in the desert and fleas are not a problem. My sheltie eats dog food which does not contain any grains. Any and all assistance is appreciated.

Allergies perhaps? Maybe check out something like this and see if you feel it would be worth a try:

Halo Dream Coat (http://www.onlynaturalpet.com/products/Halo-Dream-Coat/115025.aspx)