The developmental periods of a dog
Beginning in the 1950s, Drs. John Paul Scott and John Fuller conducted a comprehensive study of canine behavioral development to date. Their research lasted 13 years, and involved five different breeds of dogs: the Basenji, Cocker Spaniel, Wire Fox Terrier, Beagle, and Shetland Sheepdog. These breeds were chosen to represent the different breed groups so that a greater degree of behavioral differences could be seen. During the research, the environmental factors for all of the dogs were kept the same (i.e., they were all housed and raised the same) in order to better understand the effects of heredity on behavior.
Scott and Fuller described four periods of behavioral development of dogs less than a year old:
- Neonatal period (birth to 2 weeks)
- Transitional period (2 to 3 weeks)
- Socialization period (3 to 12 weeks)
- Juvenile period (12 weeks to maturity)
- Beyond the juvenile period
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