Hi Ann. You can start teaching your puppy right away and it does not have to be negative. Reward him for keeping all four paws on the ground with a chest rub. Teach him to sit before he gets his food or water bowl. Call him to you and give him a treat or just lots of praise. Positive reenforcement works well, but you should be ready to correct any naughty behavior. Sometimes ignoring it works, but other times corrections are in order. My labradoodle Sawyer is so smart but I can see he needs our guidance and training so that he can have good manners and know his place in our family. Just like children!