There's three stages that these puppies go through before being considered fully mature. You can expect to have a happy dog who is very excited about life, but they will lessen as they get older.
When your dog is about 12-18 months old, they will start to become calmer. They will have grown out of the puppy stage and become an adult dog. Even if you see some energy loss after your puppy's first tooth is lost at 6-8 months, don't be too happy. They can still get a little crazy even when they’re adults.