My Rotti and Toller mix both have under coats but they don't shed too much because I use a shedding blade on them everyday plus I brush them and comb them with a grooming comb made for pulling out the under coat. I took my Rotti to the vet 2 weeks ago for a check-up and he said she has one of the best looking Rotti coats that he's seen in a long time and then we told him that we brush her alot and then he said most people don't because they assume because it's a short-haired breed that they shouldn't need to be groomed that often.