How common is it for ferrets to dig into walls?

ive had ferrets for ages and they have never tried digging into my walls. the only issue i have with them is scratching at my sliding door which has bits of wood come off and it looks stupid. i dont think ferrets normally do that. i think it would have to be incredibly bored to actually get through a wall.. and then the owners didnt even stop it? im sure it would take days for a ferret to actually get through the wall and make a hole.. it would be done with contant scratching or biting.. that seems a bit odd. sorry but i dont see how that can happen in just casual play. i think they were irresponsible owners.