What are some of the causes of Dry or Flaky Skin on Dogs? Sometimes it is as simple as just dry skin on your dog, but other times the causes can be quite serious. There are many different causes of dry skin. It's a long list and can be difficult to diagnose. Here is a list of different causes for dry skin: Black Hair Follicular Dysplasia/Alopecia/Dystrophy This is a rare hereditary disease in dogs with different hair colors. It's more common in Bearded Collies, Basset Hounds, Salukis, Beagles, Dachshunds, and Pointers. The Symptoms are loss of dark or black hair...