I didn't mean, he WON'T chew anything he shouldn't, as I know he'll get ahold of some things that don't belong to him.
What I ment was I'm not keen on giving dogs things that we don't wnat anymore. Like, isn't a shoe as shoe? Like if we give a dog an old shoe, won't he want our new one? Same goes for any clothes or anything else that's human-owned.
Sorry, I don't think I'm explaining myself very well...