Puppies can't distinguish between what is OK for them to chew and what is not.....unless you catch them chewing the wrong thing and say"NO" and immediately replace it with one of their toys and say "GOOD BOY!" Then he will get used to being praised for his "good" chewing. Also, when you get a puppy, you have to expect some distruction. They are, after all, animals
....even though we like to treat them as our babies!! Our children aren't brought into this world knowing right from wrong......we spend years teaching them........puppies aren't any different, in that respect!!