A critical review of electrical water-bath stun systems for poultry slaughter and recent developments in alternative technologies

Journal of Applied Animal Welfare Science

Volumn 13, Issue 4, 2010, Pages 281-299

  Shields, Sara J ^a   Raj, A B M ^b  

^a Shields Consulting   (United States)

^b UNIVERSITY OF BRISTOL   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

ANIMAL WELFARE; ARTICLE; AUTOMATION; BATH; BIRD; CONSCIOUSNESS; CONTROLLED ATMOSPHERE KILLING SYSTEM; ELECTRIC POTENTIAL; ELECTRIC SHOCK; ELECTRICAL PARAMETERS; ELECTRICAL WATER BATH STUN SYSTEM; GAS MIXING; NECK; NONHUMAN; POULTRY; PROCESS DESIGN; PROCESS TECHNOLOGY; SCALD; SCIENTIFIC LITERATURE; SEIZURE; SLAUGHTERHOUSE; STANDARD; UNCONSCIOUSNESS; UNITED STATES;

ABATTOIRS; ANIMAL WELFARE; ANIMALS; CHICKENS; ELECTROENCEPHALOGRAPHY; ELECTROSHOCK;

ANIMALIA; AVES;

EID: 77957235550     PISSN: 10888705     EISSN: None     Source Type: Journal    
DOI: 10.1080/10888705.2010.507119     Document Type: Article

References (83)

1. Abeyesinghe, S. M., McKeegan, D. E. F., McLeman, M. A., Lowe, J. C., Demmers, T. G. M., White, R. P., Wathes, C. M. (2007). Controlled atmosphere stunning of broiler chickens: I. Effects on behaviour, physiology and meat quality in a pilot scale system at a processing plant. British Poultry Science, 48, 406-423.
2. Andrews, E., Bennett, B. T., Clark, J. D., Houpt, K. A., Pascoe, P. J., Robinson, G. W., & Boyce, J. R. (1993). Report of the AVMA panel on euthanasia. Journal of the American Veterinary Medical Association, 202, 229-249.
3. Animal Agriculture Alliance. (n.d.). Statement by the Animal Agriculture Alliance Coalition: Agriculture's commitments to animal well-being. Retrieved from http://www.animalagalliance.org/images/ag_insert/Pew/Animal_Welfare.pdf
4. Ashdown, T. (1998). Poultry processing. In J. M. Stellman (Ed.), International Labour Organization encyclopaedia of occupational health and safety (4th ed., pp. 67.17-67.22). Geneva, Switzerland: International Labour Organization.
5. Bedanova, I., Voslarova, E., Chloupek, P., Pistekova, V., Suchy, P., Blahova, J., Vecerek, V. (2007). Stress in broilers resulting from shackling. Poultry Science, 86, 1065-1069.
6. Bilgili, S. F. (1992). Electrical stunning of broilers-basic concepts and carcass quality implications: A review. Journal of Applied Poultry Research, 1(1), 135-146.
7. Bilgili, S. F. (1999). Recent advances in electrical stunning. Poultry Science, 78, 282-286.
8. Boyd, F. (1994).Humane slaughter of poultry: The case against the use of electrical stunning devices. Journal of Agricultural & Environmental Ethics, 7, 221-236.
9. Cobb, R. (2004). The chicken hangers: INTHEFRAY. Retrieved from http://www.thelaborers.net/NEWS/poultry_workers/default.htm
10. Coenen, A. M. L., Lankhaar, J., Lowe, J. C., & McKeegan, D. E. F. (2009). Remote monitoring of electroencephalogram, electrocardiogram, and behavior during controlled atmosphere stunning in broilers: Implications for welfare. Poultry Science, 88, 10-19.
11. Commission of the European Communities. (2008). Proposal for a council regulation on the protection of animals at the time of killing. Retrieved from http://ec.europa.eu/food/animal/welfare/slaughter/proposal_en.pdf
12. Craig, E. W., & Fletcher, D. L. (1997). A comparison of high current and low voltage electrical stunning systems on broiler breast rigor development and meat quality. Poultry Science, 76, 1178-1181.
13. Croft, P. S. (1952). Problems of electrical stunning. The Veterinary Record, 64, 255-258.
14. Danbury, T. C., Weeks, C. A., Chambers, J. P., Waterman-Pearson, A. E., & Kestin, S. C. (2000). Self-selection of the analgesic drug carprofen by lame broiler chickens. The Veterinary Record, 146, 307-311.
15. Debut, M., Berri, C., Arnould, C., Guemené, D., Santé-Lhoutellier, V., Sellier, N., Le Bihan-Duval, E. (2005). Behavioural and physiological responses of three chicken breeds to pre-slaughter shackling and acute heat stress. British Poultry Science, 46, 527-535.
16. Ernsting, J. (1965). The effect of anoxia on the central nervous system. In J. A. Gillies (Ed.), A text book of aviation physiology (pp. 271-289). Oxford, UK: Pergamon.
17. European Food Safety Authority. (2004a). Opinion of the Scientific Panel on Animal Health and Welfare on a request from the commission related to welfare aspects of the main systems of stunning and killing the main commercial species of animals. The EFSA Journal, 45, 1-29.
18. European Food Safety Authority. (2004b). Scientific report of the Scientific Panel on Animal Health and Welfare on a request from the commission related to welfare aspects of animal stunning and killing methods (pp. 125-126). Retrieved from http://www.efsa.europa.eu/cs/BlobServer/Scientific_Opinion/opinion_ahaw_02_ej45_stunning_report_v2_en1,1.pdf?ssbinary=true
19. Food and Agriculture Organization of the United Nations. (2008). FAO-STAT. Retrieved from http://faostat.fao.org/site/569/DesktopDefault.aspx?PageIDD569#ancor
20. Food Safety Inspection Service. (2005). Slaughter inspection training. Poultry postmortem inspection (p. 15). Retrieved from http://www.fsis.usda.gov/PDF/PSIT_PostMortem.pdf
21. Gazdziak, S. (2007, December). Kill floor improvements: Automation on the poultry kill and eviscerating lines is increasing efficiency and product quality. The National Provisioner, pp. 66-68.
22. Gentle, M. J. (1992). Ankle joint (artc. intertarsalis) receptors in the domestic fowl. Neuroscience, 49, 991-1000.
23. Gentle, M. J., & Tilston, V. L. (2000). Nociceptors in the legs of poultry: Implications for potential pain in pre-slaughter shackling. Animal Welfare, 9, 227-236.
24. Goldie, L., & Green, J. M. (1961). Spike and wave discharges and alteration of conscious awareness. Nature, 191, 200-201.
25. Gregory, N. G. (1986). The physiology of electrical stunning and slaughter. In Proceedings of a symposium at the Zoological Society of London (pp. 3-14). Hertfordshire, UK: Universities Federation for Animal Welfare.
26. Gregory,N. G. (1987). Determination of impaired brain function in animals in the laboratory. In Preslaughter stunning of food animals (pp. 2-16). Brussels, Belgium: European Conference Group on the Protection of Farm Animals.
27. Gregory, N. G. (1994). Pathology and handling of poultry at the slaughterhouse. World's Poultry Science Journal, 50, 66-67.
28. Gregory, N. G., Austin, S. D., & Wilkins, L. J. (1989). Relationship between wing flapping at shackling and red wingtips in chicken carcasses. The Veterinary Record, 124, 62.
29. Gregory, N. G., & Bell, J. C. (1987).Duration of wing flapping in chickens shackled before slaughter. The Veterinary Record, 121, 567-569.
30. Gregory, N. G., & Wotton, S. B. (1986). Effect of slaughter on the spontaneous and evoked activity of the brain. British Poultry Science, 27, 195-205.
31. Gregory, N. G., & Wotton, S. B. (1987). Effect of electrical stunning on the electroencephalogram in chickens. British Veterinary Journal, 143, 175-183.
32. Gregory, N. G., & Wotton, S. B. (1990). Effect of stunning on spontaneous physical activity and evoked activity in the brain. British Poultry Science, 31, 215-220.
33. Gregory, N. G., & Wotton, S. B. (1991). Effect of a 350 Hz DC stunning current on evoked responses in the chicken's brain. Research in Veterinary Science, 50, 250-251.
34. Heath, G. B., Watt, D. J., Waite, P. R., & Meakins, P. A. (1983). Further observations on the slaughter of poultry. British Veterinary Journal, 139, 285-290.
35. Heath, G. B., Watt, D. J., Waite, P. R., & Ormond, J. M. (1981). Observations on poultry slaughter. The Veterinary Record, 108, 97-99.
36. Her Majesty's Stationery Office. (1995). The welfare of animals (slaughter or killing) regulations, Statutory Instrument No. 731.
37. Kannan, G., Heath, J. L., Wabeck, C. J., & Mench, J. A. (1997). Shackling of broilers: Effects on stress responses and breast meat quality. British Poultry Science, 38, 323-332.
38. Kannan, G., & Mench, J. A. (1996). Influence of different handling methods and crating periods on plasma corticosterone concentrations in broilers. British Poultry Science, 37, 21-31.
39. Kettlewell, P. J., & Hallworth, R. N. (1990). Electrical stunning of chickens. Journal of Agricultural Engineering Research, 47, 139-151.
40. Kingsbury, A. (2007, August). Controlled atmospheric stunning: ACA co-operative installs North America's first system for broilers. Canadian Poultry Magazine, pp. 28-30.
41. Kotula, A. W., Drewniak, E. E., & Davis, L. L. (1957). Effect of carbon dioxide immobilization on the bleeding of chickens. Poultry Science, 36, 585-589.
42. Lambooij, E., Pieterse, C., Hillebrand, S. J. W., & Dijksterhuis, G. B. (1999). The effects of captive bolt and electrical stunning, and restraining methods on broiler meat quality. Poultry Science, 78, 600-607.
43. Lee, K. M., Gogate, R., & Carey, R. (1998). Automated singulating system for transfer of live broilers. In Proceedings of the 1998 Institute of Electrical and Electronics Engineers (IEEE) International Conference on Robotics and Automation (pp. 3356-3361). Leuven, Belgium.
44. Ludders, J. W. (2001). Inhaled anaesthesia for birds. In R. D. Gleed & J. W. Ludders (Eds.), Recent advances in veterinary anesthesia and analgesia: Companion animals. Ithaca, NY: International Veterinary Information Service.
45. Lues, J. F. R., Theron, M. M., Venter, O., & Rasephei, M. H. R. (2007). Microbial composition in bioaerosols of a high throughput chicken-slaughtering facility. Poultry Science, 86, 142-149.
46. Lutgring, K. R., Linton, R. H., Zimmerman, N. J., Peugh, M., & Heber, A. J. (1997). Distribution and quantification of bioaerosols in poultry-slaughtering plants. Journal of Food Protection, 60, 804-810.
47. McKeegan, D. E., Abeyesinghe, S. M., McLeman, M. A., Lowe, J. C., Demmers, T. G. M., White, R. P., Wathes, C. M. (2007). Controlled atmosphere stunning of broiler chickens: II. Effects on behaviour, physiology and meat quality in a commercial processing plant. British Poultry Science, 48, 430-442.
48. McKeegan, D. E. F., McIntyre, J. A., Demmers, T. G. M., Lowe, J. C., Wathes, C. M., van den Broek, P. L. C., Gentle, M. J. (2007). Physiological and behavioural responses of broilers to controlled atmosphere stunning: Implications for welfare. Animal Welfare, 16, 409-426.
49. McKeegan, D. E. F., McIntyre, J., Demmers, T. G. M., Wathes, C. M., & Jones, R. B. (2006). Behavioural responses of broiler chickens during acute exposure to gaseous stimulation. Applied Animal Behaviour Science, 99, 271-286.
50. National Institute for Animal Agriculture (NIAA). (2007, Fall/Winter). U.S. broiler health shows slight decline. Poultry Health Report, p. 2.
51. Nunes, F. (2007). How to avoid bruising during electrical poultry stunning. Retrieved from http://Meatingplace.com
52. Occupational Safety and Health Administration. (2005). Receiving and killing-task 3: Live hang. Poultry processing industry eTool. U.S. Department of Labor. Retrieved from http://www.osha.gov/SLTC/etools/poultry/receiving/03_live_hang.html
53. Office International des Épizooties. (2008a). Second OIE Global Conference on Animal Welfare (pp. 20-22). Retrieved from http://www.oie.int/eng/A_AW2008/ANG_Final%20Recommendations.pdf
54. Office International des Épizooties. (2008b). Terrestrial Animal Health Code 2007. Section 3.7.5. Guidelines for the slaughter of animals. World Organisation for Animal Health. Retrieved from http://www.oie.int/eng/normes/mcode/en_chapitre_3.7.5.htm
55. Porter, R. J., & Penry, J. K. 1973. Responsiveness at the onset of spike-wave bursts. Electroencephalography and Clinical Neurophysiology, 34, 239-245.
56. Raj, A. B. M. (1996). Aversive reactions of turkeys to argon, carbon dioxide and a mixture of carbon dioxide and argon. The Veterinary Record, 138, 592-593.
57. Raj, A. B. M. (1998). Welfare during stunning and slaughter of poultry. Poultry Science, 77, 1815-1819.
58. Raj, A. B. M. (2003). A critical appraisal of electrical stunning in chickens. World's Poultry Science Journal, 59(1), 89-98.
59. Raj, A. B. M. (2004). Stunning and slaughter of poultry. In G. C. Mead (Ed.), Poultry meat processing and quality. Cambridge, UK: Woodhead.
60. Raj, A. B. M., & Gregory, N. G. (1991). Efficiency of bleeding of broilers after gaseous or electrical stunning. Veterinary Record, 128, 127-128.
61. Raj, A. B. M., Grey, T. C., & Gregory, N. G. (1990). Effect of electrical and gaseous stunning on the carcass and meat quality of broilers. British Poultry Science, 31, 725-733.
62. Raj, A. B. M., O'Callaghan, M., & Hughes, S. I. (2006a). The effects of amount and frequency of pulsed direct current used in water bath stunning and of slaughter methods on spontaneous electroencephalograms in broilers. Animal Welfare, 15, 19-24.
63. Raj, A. B. M., O'Callaghan, M., & Hughes, S. I. (2006b). The effects of pulse width of a direct current used in water bath stunning and of slaughter methods on spontaneous electroencephalograms in broilers. Animal Welfare, 15, 25-30.
64. Raj, A. B. M., O'Callaghan, M., & Knowles, T. G. (2006). The effects of amount and frequency of alternating current used in water bath stunning and of slaughter methods on electroencephalograms in broilers. Animal Welfare, 15, 7-18.
65. Raj, A. B. M., O'Callaghan, M. C., Thompson, K., Becket, D., Morrish, I., Love, A., Howson, S. (2008). Large-scale killing of poultry species on farm during outbreaks of diseases: Evaluation and development of a humane containerised gas killing system. World's Poultry Science Journal, 64, 227-243.
66. Sams, A. R. (2001). First processing: Slaughter through chilling. In A. R. Sams (Ed.), Poultry meat processing (p. 21). Washington, DC: CRC.
67. th International Congress of the International Society for Applied Ethology (p. 64). Bristol, UK: ISAE Scientific Committee.
68. Sandilands, V., Raj, A. B. M., Baker, L., & Sparks, N. H. C. (2008). Humane culling of poultry during a disease outbreak: Aversion to various gas mixtures. British Poultry Abstracts, 4, 22-23.
69. Satterlee, D. G., Parker, L. H., Castille, S. A., Cadd, G. G., & Jones, R. B. (2000). Struggling behavior in shackled male and female broiler chickens. Poultry Science, 79, 652-655.
70. Schütt-Abraham, I., Wormuth, H. J., & Fessel, J. (1983). Electrical stunning of poultry in view of animal welfare and meat production. In G. Eikelenboom (Ed.), Stunning of animals for slaughter (pp. 187-196). The Hague, The Netherlands: Martinus Nijhoff.
71. Shane, S. (2005). Future of gas stunning. WATT Poultry USA, 6(4), 16-23.
72. Sparrey, J. M., & Kettlewell, P. J. (1994). Shackling of poultry: Is it a welfare problem? World's Poultry Science Journal, 50, 167-176.
73. Sparrey, J. M., Kettlewell, P. J., Paice, M. E. R., & Whetlor,W. C. (1993). Development of a constant current water bath stunner for poultry processing. Journal of Agricultural Engineering Research, 56, 267-274.
74. Tyson, J. (n.d.). Live production animal well-being: Our mission statement on animal well-being. Retrieved from http://www.tyson.com/Corporate/AboutTyson/LiveProduction/AnimalWellBeing.aspx
75. U.S. Department of Agriculture. (2010). Poultry slaughter: 2009 annual summary. National Agricultural Statistics Service. Retrieved from http://usda.mannlib.cornell.edu/usda/current/PoulSlauSu/PoulSlauSu-02-25-2010.pdf
76. Van der Sluis, W. (2007). Gas stunning reduces rejects in spent hen processing.World Poultry, 23(9), 30-31.
77. von Wenzlawowicz, M., & von Holleben, K. (2001). Assessment of stunning effectiveness according to the present scientific knowledge on electrical stunning of poultry in a waterbath. Archiv für Geflügelkunde, 65, 193-198.
78. Webster, A. B. (2007). The commercial egg industry should consider controlled atmosphere stunning for spent hens. The Poultry Site. Retrieved from http://www.thepoultrysite.com/articles/864/thecommercial-egg-industry-should-consider-controlled-atmosphere-stunning-for-spent-hens
79. Webster, A. B., & Fletcher, D. L. (2004). Assessment of the aversion of hens to different gas atmospheres using an approach-avoidance test. Applied Animal Behaviour Science, 88, 275-287.
80. Wilkins, L. J., Wotton, S. B., Parkman, I. D., Kettlewell, P. J., & Griffiths, P. (1999). Constant current stunning effects on bird welfare and carcass quality. Journal of Applied Poultry Research, 8, 465-471.
81. Woolley, S. C., Borthwick, F. J. W., & Gentle M. J. (1986a). Flow routes of electric currents in domestic hens during pre-slaughter stunning. British Poultry Science, 27, 403-408.
82. Woolley, S. C., Borthwick, F. J.W., & Gentle M. J. (1986b). Tissue resistivities and current pathways and their importance in pre-slaughter stunning of chickens. British Poultry Science, 27, 301-306.
83. Wooton [sic for Wotton], S. B., & Gregory, N. G. (1991). How to prevent pre-stun electric shocks in waterbath stunners. Turkeys, 39(2), 15, 30.