People: Troy Gibson, Georgina Limon-Vega, Carlos Rebelo, Theo Demmers, Siobhan Abeyesinghe, Natalie Chancellor

Livestock are routinely stunned to render them unconscious and insensible to pain and distress associated with slaughter. We have competed, and are currently conducting, a number of studies into different stunning and slaughter methods to improve their effectiveness and humaneness.

These studies include:

  • Maximising the humaneness of poultry and waterfowl slaughter
  • Investigation of the pathophysiology of captive bolt injury in sheep, alpacas and horses
  • Development of alternatives to waterbath stunning for small to medium scale poultry producers
  • Assessment of the humaneness of slaughter methods for guinea pigs for human consumption in the Andean region of South America
  • Development of humane methods for the dispatch of kangaroo in-pouch young
  • The effect of position of the neck cut on time to loss of consciousness in cattle slaughtered without stunning
  • Comparison of upright and inverted restraint of cattle during slaughter without stunning
  • Welfare assessments of poultry gas stunning methods
  • Welfare implications for new emergency methods whole house poultry disease control killing
    horned ewe

Octavio Oliveira, S.E., Dalla Costa, F.A., Gibson, T.J., Dalla Costa, O.A., Coldebella, A., and Gregory, N.G. (2018). Evaluation of brain damage resulting from penetrating and non–penetrating stunning in Nelore Cattle using pneumatically powered captive bolt guns. Meat Science. 145, 347-351. https://doi.org/10.1016/j.meatsci.2018.07.016  

Gibson, T.J., Rebelo, R.B., Gowers, T.A., and Chancellor, N. (2017) Electroencephalographic assessment of concussive non- penetrative captive-bolt stunning of turkeys. British Poultry Sciencehttp://dx.doi.org/10.1080/00071668.2017.1401215

Octavio Oliveira, S.E., Gregory, N.G., Dalla Costa, F.A., Gibson, T.J., Paranhos da Costa, M. (2017) Efficiency of low versus high airline pressure in stunning cattle with a pneumatically powered penetrating captive bolt gun. Meat Science. 130, 64-68. https://doi.org/10.1016/j.meatsci.2017.04.007

Gibson, T.J., Taylor, A.H., and Gregory, N.G. (2016). Assessment of the effectiveness of head-only and back-of-the-head electrical stunning of chickens. British Poultry Science: 1-11. http://www.tandfonline.com/doi/full/10.1080/00071668.2016.1156648

Limon, G., Gozales-Gustavson, E.A., and Gibson, T.J. (2016). Investigation of the humaneness of slaughter methods for guinea pigs (Cavia porcelus) in the Andean region. Journal of Applied Animal Welfare Science. 1-14. http://www.tandfonline.com/doi/full/10.1080/10888705.2016.1138116

Gibson, T. J., et al. (2015). "Pathophysiology of penetrating captive bolt stunning in Alpacas (Vicugna pacos)." Meat Science 100: 227-231. http://dx.doi.org/10.1016/j.meatsci.2014.10.022

Gibson, T. J., et al. (2015). "Pathophysiology of free-bullet slaughter of horses and ponies." Meat Science 108: 120-124. http://dx.doi.org/10.1016/j.meatsci.2015.06.007

Gibson, T. J., et al. (2015). "Effect of neck cut position on time to collapse in halal slaughtered cattle without stunning." Meat Science 110: 310-314. http://dx.doi.org/10.1016/j.meatsci.2015.03.026

Sharp, T.M., McLeod, S.R., Leggett, K.E.A., and Gibson, T.J. (2015). Evaluation of spring-powered captive bolt guns for dispatch of kangaroo in-pouch young. Wildlife Research. 41 (7), 623-632. http://dx.doi.org/10.1071/WR14094

Gibson, T.J., Mason, C.W., Spence, J.Y., Barker, H., and Gregory, N.G. (2015). Factors affecting penetrating captive bolt gun performance. Journal of Applied Animal Welfare Science. 18 (3), 222-238. http://www.tandfonline.com/doi/full/10.1080/10888705.2014.980579

McKeegan, D. E. F., Reimert, H. G. M., Hindle, V. A., Boulcott, P., Sparrey, J. M., Wathes, C. M., ... & Gerritzen, M. A. (2013). Physiological and behavioral responses of poultry exposed to gas-filled high expansion foam. Poultry science, 92(5), 1145-1154.

Gibson, T.J., Ridler, A.L., Lamb, C.R., Williams, A., Giles, S., and Gregory, N.G. (2012). Preliminary evaluation of the effectiveness of captive bolt guns as a killing method without exsanguination for horned and un-horned sheep. Animal Welfare. 21, Supplement 2, 35-42.

 Gregory, N.G., von Wenzlawowicz, M., von Holleben, K., Fielding, HR., Gibson, TJ., and  Kolesar, R. (2012). Complications during Halal slaughter and Shechita in cattle. Animal Welfare. 21, Supplement 2, 81-86.

 Johnson, C.B., Gibson, T.J., Stafford, K.J., and Mellor, D.J. (2012). Pain perception at slaughter. Animal Welfare. 21, Supplement 2, 113-122.    

 Limon, G., Guitian, J., & Gregory, N. G. (2012). A review of the humaneness of puntilla as a slaughter method. Animal Welfare, 21, 3-8. doi:Doi 10.7120/096272812x13353700593248

 McKeegan, D. E. F., Sparks, N. H. C., Sandilands, V., Demmers, T. G. M., Boulcott, P., & Wathes, C. M. (2011). Physiological responses of laying hens during whole-house killing with carbon dioxide. British poultry science, 52(6), 645-657.[s1]

 Limon, G., Guitian, J., & Gregory, N. G. (2010). An evaluation of the humaneness of puntilla in cattle. Meat Science, 84, 352-355.   

 Limon, G., Guitian, J., & Gregory, N. G. (2009). A note on the slaughter of llamas in Bolivia by the puntilla method. Meat Science, 82(3), 405-406. doi:DOI 10.1016/j.meatsci.2009.01.022

MCKEEGAN, D. E., ABEYESINGHE, S. M., MCLEMAN, M. A., LOWE, J. C., DEMMERS, T. G., WHITE, R. P., KRANEN, R. W., VAN BEMMEL, H., LANKHAAR, J. A. & 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. PubMed ID 17701496 http://dx.doi.org/10.1080/00071660701543097

ABEYESINGHE, S. M., MCKEEGAN, D. E., MCLEMAN, M. A., LOWE, J. C., DEMMERS, T. G., WHITE, R. P., KRANEN, R. W., VAN BEMMEL, H., LANKHAAR, J. A. & 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. PubMed ID 17701494. http://dx.doi.org/10.1080/00071660701543089  

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