You might want to look at two of our products, Derma-IonX and Defendex shampoo to help heal the skin. Derma-IonX which is an oral homeopathic product stimulates the enzyme systems in the body which reduces itching and inflammation, promotes healing of the skin and helps with assimilation of nutritional components in diet and supplements. The supplements I use along with it include digestive enzymes, probiotics, vitamin C, MSM, and fish oil. Together with Derma-IonX it produces a synergistic effect for a faster response. It can also be used topically if there are troublesome spots on the skin. I would also suggest that you give your dog only filtered water for drinking and bathing if your water contains chlorine or fluoride. For the dietary modifications you might want to try a grain free diet for a while. Turkey or fish would be preferred protein sources if your dog is not allergic to them, since these are considered to be cooling.
Defende shampoo which was designed to fight against fleas and mites also washes away debris and soothes the skin. Using both products is a simple and effective way of helping resolve a difficult condition.
Please feel free to contact us again if you have any other questions.