You might want to look at some of our products to help heal the skin and ears. 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 probiotics, vitamin C, MSM, and Omega 3,6,9. Together with DERMA-IONX it produces a synergistic effect for a faster response. 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. I would choose a cooling diet according to Chinese food therapy. The cooling protein sources are fish and turkey. Either of these might be worth a try if your dog is not allergic to them.
For chronic ears I like to use Zymox ear drops to kill the microbes in the ears. Your veterinarian might be able to get it for you. Using these products can help resolve a difficult condition.
Please feel free to contact us again if you have any other questions.