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Effects of catching and transportation versus pre-slaughter handling at the abattoir on the prevalence of wing fractures in broilers

By K. E. Kittelsen, E. G. Granquist, G. Vasdal, E. Tolo, R. O. Moe

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Fractures occurring in conscious broiler chickens are painful and severely compromise animal welfare. The aim of this study was to investigate the effects of pre-slaughter handling procedures on the frequency of wing fractures. Wings were examined for fractures in 11,609 broilers, from 12 different flocks, slaughtered in two abattoirs: one using bi-phasic CO 2 stunning (CS); and one using electric water-bath stunning (ES). The same broilers were examined: (i) in lairage, representing fractures attributed to catching and transportation; (ii) after evacuation of transport containers and shackling (only ES); and (iii) post-stunning. The mean frequencies of wing fractures were: in the lairage; 0.8% (CS 0.73%, ES 0.88%); after shackling prior to stunning; 2.90% (only ES); and after stunning; 2.35% (CS 1.80%, ES 2.90%). Regardless of stunning method, significantly more fractures occurred during pre-slaughter handling at the abattoirs than during catching/transportation. The difference in prevalence between CS and ES was not significant. All fractures observed in the ES occurred in conscious animals, whereas in the CS it was not possible to distinguish between fractures occurring in conscious or stunned broilers. From a welfare perspective, fractures occurring on-farm/transport result in prolonged suffering and are thus considered more serious in risk assessments of broiler welfare, even though more fractures occur at the abattoir. Monitoring of wing fractures at abattoirs should be included as an indicator of broiler welfare.

Publication Title Animal Welfare
Volume 24
Issue 4
Pages 387-389
ISBN/ISSN 0962-7286
DOI 10.7120/09627286.24.4.387
Language English
Author Address Animalia, Norwegian Meat and Poultry Research Centre, Lorenveien 38, 0515 Oslo,
Cite this work

Researchers should cite this work as follows:

  1. Animals
  2. Animal welfare
  3. Birds
  4. Broilers
  5. Effect
  6. Flocks
  7. Fowls
  8. Fractures
  9. Handling
  10. Incidence
  11. monitoring
  12. peer review
  13. Poultry
  14. slaughterhouses
  15. stunning
  16. transportation
  17. vertebrates
  18. wings
  1. peer review