Any area which is accessible to a puppy (or other animal) in which the animal can and will destroy property (shoes, toothbrushes, purses, etc...)
The Chew Zone can be redefined as said animal grows.
Ex 1. Since I left my shoes in the chew zone, Spot went to town.
Ex 2. Don't leave anything in the chew zone if you want to see it in one piece again.