I have a lab/shepherd mix who is about a year old, and he23 chews....We tried sprays, we tried punishment, we tried distractions....nothing seems to work. He has eaten everything from shoes, plungers, bras, the hardwood floor, the pillar (we have an old house) the legs of my coffee table, his own cage, electrical cords, mud, sticks, doors.....The only thing we could do was get him a cage, and that was his punishment, was to have his nose rubbed in it, and put in his cage for a bit.