Stage 1: Birth - 2 weeks

After an initial gestation period of approximately 2 months, a puppy is born blind and deaf - less developed than a human baby. This first stage of development is often referred to as "neonatal." For most of this stage, the puppy is entirely dependent on its mother In addition to their sensory handicap after birth, their movement is severely limited, they cannot regulate their own body temperature, and they require special stimulation to remove waste products. They can, however, cry, and the suck reflex is already strong. Smell, touch, and taste are all active and strong. Within the first week after birth, a puppy will normally double its own weight.

The puppy's ear canals will open right around the 2 week mark, allowing it to hear sounds for the first time. The sense of hearing will fully develop over the course of the next few stages. Socialization is important at every stage of a puppy's life, but is perhaps most important during the neonatal period. The puppy will be learning the basics from its mother and littermates; movement, social etiquette, and most important of all: rules, boundaries, and limitations!

Next: Stage 2 -- 2 to 4 weeks