My lab is probably 7. (He may be 8, based on what the vet said when we adopted him.) We have never had a bit of trouble with him with chewing up stuff. When we first got him he started to chomp down on the coffee table in the living room, but I gave him a loud “Aah-Aah!”, and that was the end of that.
We always make sure he has toys to chew on, and sometimes he chews on sticks outside. But maybe the big factor is that he is almost always with us, as we are retired. Maybe the dog in the story is anxious because he spends time alone.
Now, lest you think my dog is a complete angel, don’t even get me started on his counter surfing ecapades. :)
She did chew place on my deck. So she no longer get tied up on the deck. She loves to chew sticks and animal bones if she finds them. We do keep her toys around at all times. My husband is retired so she's not alone much. But until these cats start being nicer to her, she is in her kennel and apartment at night. Soon, I hope to have her in the house most of the time.