My dog... chews on... EVERYTHING.?

sounds to me like he is still a puppy all puppy chew on thangs its up to u to show him right from worng when u catch him chewing on something he is not spoused too his tell him now and show him why u did what u did grab the thang he was chewing on slap him with it not too hard just enough to get him to understand then give him a chew bone and let him have a happy with that bye chew ropes dong rawhids stuff like that will keep his mind off of chewing outher thangs he is a puppy so he dont understand what he can and cant do thats ur job to teach him