This article is from the Rottweilers Breed FAQ, by email@example.com (Denise Gross).
The Rottweiler is a double-coated breed, with a medium length outer
coat and a soft downy undercoat. They do shed, more than one would
think by looking at their appearance. The amount of shedding will vary
with climatic conditions. They generally tend to "blow out" their
undercoats twice a year, in spring and fall.