We rescued our mastiff 2 years ago and he has been suffering with these skin conditions ever since. They form circular shapes, are very crusty and itchy and we can't imagine how uncomfortable he is (not ring worm). We've been told it could be diet related so we switched to raw...nothing changed with his coat. We now cook his food for him and add different supplements to his meals. His condition is just getting worse and he doesn't react well to vet prescribed drugs. The vets suggested using a particular shampoo and washing him at least once a week. His coat gets very oily and has a pretty bad odour to it as well. Open to any suggestions here! Whether topical or supplements that can ease his symptoms. Any success stories would also be great to hear.