One often sees people get a new puppy and think that it will just know how to live with a human in the way that they want him to. We think it will automatically know how to come to us when we call them, do its business in an appropriate place, and relax quietly by our side while we settle down to watch our favorite television program.
Then you come home one day to find that your favorite chair has been eaten, the trash can has been tipped over along with its entire contents, and Fido has soiled your new Persian rug.
What happened to that adorable, sweet puppy you brought home? Absolutely nothing. He is just acting like a bored and unsupervised canine baby would act. You expected him to figure out what he is supposed to do and that's exactly what he did. He kept himself occupied while you were gone and had a grand time doing it.
Some basic tools of management are baby gates, crates, tethers, and leashes. If you are not home, do not let your puppy have the run of the house. He will destroy things and may get hurt. Train him to stay in his crate or make him a safe place in a room.
When you are home with him, keep him on a tether or leash by your side to ensure that he does not get into anything and harm himself, and keep an eye on him in case he needs to do his business.
If your puppy grabs the bread that you leave on the counter when you're not looking, don't leave the bread on the counter. This will prevent him from developing a habit of doing so. If he gets into the trashcan, put it in a place he can't reach, or secure it with a foolproof lid.
Your duty is to make your puppy's new home safe and secure for him and to let him know what the rules are.