Share 'dry flaky skin'

My 10month old Rotty has extremely dry skin, cause excesive flaking. I'm feeding him Chicken Soup for large breeds and I am supplementing his food with A1/N, which is a medically formulated essential fatty acid supplement that my Vet has reccomended. I'm using an all natural oatmeal shampoo and have reduced his baths to every 4-6 weeks. He has only been on the supplement for about a week and so f…