Our puppy Lex has some as well. I asked the vet what he thinks was causing it. He said these guys are very sensitive and his first thought goes to internal. He said that stress can cause it. Second he goes to look at food..some foods have corn in it and it can cause the dandruff. Third and last he said it could be not washing off the shampoo well enough. So keep them happy, eating good food and overall...rinse and rinse...lol.
Good luck. I got some oatmeal shampoo to try to treat it externally.
