VideoBehaviour and psychology
The psychological development of dogs
The neonatal period (weeks 1 to 2 of a puppy's life): the puppy mostly rests. The transitional period (week 3 of a puppy's life): the senses of sight and hearing begin to develop and the puppy is more active. The character-forming period (weeks 4 to 7 of a puppy's life): during this period the puppy's brain has developed enough and become
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