Which statement best reflects proper socialization during the critical period?

• A. The puppy learns to respond to humans and new stimuli without excessive fear.
• B. The puppy becomes aggressive to strangers.
• C. The puppy develops fixed action patterns only.
• D. The puppy becomes impossible to train.

Answer: (A)

During the socialization window, what matters most is teaching the puppy to respond to humans and new stimuli with calm curiosity rather than fear. Positive, low-stress exposure to people, environments, and varied experiences helps form confident, adaptable behavior that carries into adulthood. This is why the statement describing learning to respond to humans and novel stimuli without excessive fear best reflects proper socialization. If socialization is mishandled, a puppy might become fearfully aggressive toward strangers, which is the opposite outcome, and other options misconstrue what socialization aims to achieve. Training remains possible even when a dog is fearful, though it can be more challenging if fear dominates.