I noticed that my one doe has a lot of flaky skin under her thick coat. She was wormed recentely with quest and follow-up with valbazen just a few days ago. Maybe a good bath with some tea tree oil added into it?
Like Ashley said it's usually a lack of fat in the diet. From simply starting slowly with 1/2 teaspoon and increasing over the weeks to more so she doesn't get loose poop, any oil will do, from sunflower to corn....or Black Oil Sunflower seeds, doesn't take much just a 1/2 cup a day...or Rice Bran anything high in fat will work. Vicki