This period begins with the first long excursion away from the den or nest box and ends at sexual maturity.
All the sense organs appear to be fully developed at the outset of the juvenile period. Permanent teeth begin to come in at about 16 weeks of age, and all are usually present by 6 months. Growth curves also begin to flatten out at 16 weeks. The period of rapid growth is over, and the puppy is approximately two-thirds of its adult size. (Scott and Fuller 1974)
The development of motor capacities in this period consists of increases in strength and skill rather than the emergence of new patterns.
References
- Scott, J.P., and John L. Fuller. 1974. Genetics and the Social Behaviour of the Dog. A Phoenix Book, P570. University of Chicago Press. http://esbt.us/2y [1].
- Ha, J.C., and T.L. Campion. 2018. Dog Behavior: Modern Science and Our Canine Companions. Elsevier Science. http://esbt.us/2z [2].
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