Pacific Northwest Gardening: How about another?, 1 by Jamesk

Jamesk wrote:
Some years ago I had a Bouvier des Flandres with terrible skin problems. We tried everything, and nothing seemed to work. I finally changed vets. The first thing the new vet did was check for thyroid deficiency. I can never remember if it hypo or hyper-thyroidism....but anyway, we put Nadia on a thyroid supplement, and the skin problem cleared right up.

You might consult your vet about thyroid, and see what he or she thinks.