It is called Domestic Mange. Its treatment is easy. Its hair should be cut very short to give proper treatment. Apply ointment daily till its hair grows again. If itching is increasing day be day give it Benadryl daily. Bathe in shampoo with warm water daily. Mix water with Mitaban, drench the body for 15 to 20 minutes, and let it dry by its own without using towel or dryer. Don't give bath to your pet between Mitaban dips. Give it high quality and well balanced diet. You can fail in this treatment if you don't take extra care and don't show regularity. Add few table spoons of yogurt in its food.

 My min-pin got the exact same thing-except they have really short hair... I did the mitaban thing for 3 treatments, and tried to figure what set the mange off. The vet said that all dogs have it, but it takes a suppressed immune system to trigger it. I had switched from IAM's puppy to Purina Beneful right before this all started. I switched her to IAM's (weight management) and it miraculously went away. Like I said earlier, I did give the dog 3 mitaban treatments, so maybe that in combo with the premium chow was the trick in my case. Good Luck!