there will be scratches, the girls even tried to chew the corners... (they are actively involved in a project - to dig a hole in a wall...) Like young kids, puppies can be very messy. And mastiffs are puppies for a long time, even when they're over 80 lbs or so. Of course they shouldn't be let to roam unsupervised - bad news, they can destroy the exterior of a house in no time - but accidents can happen in few seconds: a phone call/shower/someone knocking at the door. You turn back and find out that, surprise, the curtain is so much shorter and there's a piece of wood on the couch in the living room... one that looks like the wooden floors btw.