The concept of critical development periods means that during a certain time span of a puppy's life (birth through 4-5 months old) their brain develops significantly. During this period of time, they will learn where to put their energy, what they like, dislike, and more. In this video, Michael Ellis explains how to take advantage of this time during the puppy's life.

This video is taken directly out of our training DVD, Raising Your Puppy with Michael Ellis.