Hi. What you are describing is very natural for a puppy. What you need to do is make sure your puppy is walked everyday and given things that he is allowed to chew on. Never shout or smackhim for chewing, just swop him something that he is allowed to chew on. He could be teething and the chewing makes his mouth feel better. If you shout at him for chewing then he will chew even more from being stressed. Maybe take him to puppy daycare where he can play with other puppies and dogs and this will tire him out when he is at home.
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