I don't have a leather couch - I have four large leather armchairs. Dogs over the years have always curled up in them (often disputing ownership with me !). Blankets which can easily be whipped off when we have visitors, keep muddy paws at bay.
But I am bigger then they are and its MY house. I do not, and never have, tolerated distructiveness and my Basenjis know and learn to respect that !