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Dev Psychobiol. 2014 May;56(4):726-33. doi: 10.1002/dev.21141. Epub 2013 Sep 6.

The behavioral and endocrinological development of stress response in dogs.

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1
Department of Animal Science and Biotechnology, Azabu University, 1-17-71 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5201, Japan.

Abstract

Endocrinological stress response has been shown to be absent in a specific period of the early life of rodents; this is named the stress-hyporesponsive period (SHRP). The SHRP is a significant period for the appropriate development of infants. In this study, the presence of SHRP in dogs was identified by conducting a 5-min separation test in 142 Labrador retriever puppies in their early socialization period and measuring the changes in urinary cortisol levels. An increase in cortisol after separation was found after 5 weeks of age, suggesting that the SHRP persists until 4 weeks of age in dogs. The distress vocalization during separation changed and the lactating behavior decreased rapidly around 5 weeks of age, suggesting that the endocrinological and emotional aspects of development change at approximately 5 weeks of age and maternal inhibition of cortisol might occur in dogs as well as rodents.

KEYWORDS:

cortisol; dog; maternal behavior; stress-hyporesponsive period; vocalization

PMID:
24019027
DOI:
10.1002/dev.21141
[Indexed for MEDLINE]
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