If you end up with any dogs with skin problems I highly recommend
Virbac Etiderm shampoo. Koko had severe dry skin and scab scaling on her back and underarms. We took her to the Auburn University School of Veterinary Medicine for evaluation. They put her on this shampoo and all of her skin issues are gone. They said for her we should not use anything else. I end up bathing her about once a week and it leaves her coat nice and shiny. It doesn't have the fragrance of some the the shampoos already mentioned but it sure has helped with Koko's skin issues. Price wise it can be found very reasonably on the net.