My dogs suffered with dermatitis for four years, had all kinds of tests and were prescribed several different meds, as well as medicated shampoos, sprays and lotions, special foods, etc., to no avail. Finally, two years ago, I started giving them fish oil capsules that I purchased from 1 800 Petmeds.com. Within a month, all of their hair was growing back, no sores or flaky skin, and no itching. Two years later, they have never had another breakout.