dobermans are NOT outdoor dogs..... I am surprised you are not aware of this... but now that you are,, perhaps you can help him out and remedy that right away!! I dont have much in the way of advice for his skin,, but my dober girl has thinning hair,, but her skin is fine.... but please,, bring your dober boy INSIDE!!!! these dogs are Velcor babies,, they NEED thier humans and love to be close.....

dogs are pets,, not outdoor ornaments... sorry to sound harsh... but thats the bottom line as far as I am concerned!