Solution: In this situation, the young puppy is lonely, misses his family, and wants attention. The answer is to be certain you are confining him properly. Never confine a puppy or a grown dog in a small room with the door closed. If you use a see-through puppy gate or a wire dog crate, it will satisfy his need to know what's going on by being able to see, hear, and smell the family activities. Also, be sure the dog is getting enough exercise and attention.
From I JUST GOT A PUPPY, WHAT DO I DO?
Revised Edition by Mordecai Siegal and Matthew Margolis.
Copyright (c) 1992, 2002 by Mordecai Siegal and Matthew Margolis.
Reprinted by permission of Fireside, an Imprint of Simon & Schuster, Inc.