We found that whatever we did our German Shepherd puppies (we had four during our marriage), The day they turned two years of age they stopped, just like that, we have had to replace, cushionfloor, carpets cushions, tables, you name it he ate it. We bought the biggest cage to put him in if we had to go out shopping but when we got home he had managed, goodness knows how, to drag a kitchen mat into the cage with him and we had to dismantle the cage as we could not open the door to get him out. He has demolished the biggest kong toy we could get, just be patient and when you can, take him out with you otherwise you will come home to destruction.