Our 80-pound rescue dog is part-beaver and part-shopvac. He demolished a Kong Extreme (the black, hardest type).* We will check out this magical chew toy of which you speak.
Dogs who chew.
Such a challenge…
http://www.dogshaming.com/2017/04/tough-as-balls/
Oh man, I may have been using that Kong wrong. I just use peanut butter.