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Behavioural and physiological responses of laying hens to humans

By L. E. Edwards, N. A. Botheras, G. J. Coleman, P. H. Hemsworth

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Abstract

Human interactions, particularly negative ones, affect the behaviour and physiology of laying hens, with possible implications for bird productivity and welfare. The present experiment investigated the effects of handling on the behaviour and plasma corticosterone concentrations of laying hens. A 2x2x3 factorial design was used to study the following three main effects: human contact during rearing [an additional 12 min of human contact per day (AC) or no additional contact (MC) during rearing]; handling quality in adulthood [brief daily exposure to positive (+ve) or negative (-ve) visual contact with a human]; and handling proximity in adulthood [handling-quality treatment (+ve or -ve) imposed at the following three distances from the birds: Near, 0-45 cm; Middle, 45-75 cm, or Far, 75-105 cm]. AC during rearing resulted in reduced avoidance behaviour of humans during adulthood, whereas handling imposed at the Far level resulted in greater avoidance behaviour than did handling at the Near or Middle level. The quality of the handling (+ve or -ve) had little effect on avoidance behaviour; however, there was a trend (P=0.07) for hens receiving +ve handling to have a lower corticosterone response to human contact than those receiving -ve handling. These results demonstrate that visual human contact can influence the avoidance behaviour of laying hens.

Date 2010
Publication Title Animal Production Science
Volume 50
Issue 5/6
Pages 557-559
ISBN/ISSN 1836-0939
Language English
Author Address Animal Welfare Science Centre, University of Melbourne, Vic. 3010, Australia. ledwards@unimelb.edu.au
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Tags
  1. Animal behavior
  2. Animal physiology
  3. Animal rights
  4. Animal welfare
  5. Birds
  6. Chickens
  7. Corticosteroids
  8. Egg production
  9. Fowls
  10. peer-reviewed
  11. Poultry
  12. rearing
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  1. peer-reviewed