Firstly, does your little pooch have a friend. He may just be bored or have separation anxiety. Take him for walks and to the doggy parks before you are going out so that he will spend the rest of the time on his own. Never shout at him when he chews the incorrect things as this will just make him more stressed and cause him to chew even more. He is going to start getting his adult teeth soon so will be chewing even more so make sure if you do catch him in the act that you show him what he is allowed to chew and do not smack or shout at him for chewing the wrong things.
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