De-Matts are done when a dog is matted in most areas. I remove the coat because it is a lot kinder than trying the get the knots out. I start by taking as much of the coat off as possible before tackling the knotted areas in this case it is all over. Very gently I remove the coat with a 10 blade without nicking the skin. It is a lengthy procedure but has to be done. If the knots are left, they can tighten on the skin and become painful. Then I give the dog a bath with medicated shampoo.