Contrary to what the label on dog dry dog food packages claim, most of the beneficial oils and vitamins breakdown when the kibble is baked at high temperatures.
Stop treating external issues with expensive shampoos and ointments. Treat the symptoms from the inside out, this will bring about long lasting change and an overall improvement of health.
Many people don't realize the misleading words on pet food labels. A few examples would be the word by-product which can include but is not limited to: euthanized/ diseased animals, roadkill, and beaks. The origin of the protein is often from China which has little to no quality control over ingredient sources.