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Stephanie Torrey

Position/Title: Adjunct Professor

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As an associate graduate faculty member and adjunct faculty member, Dr Stephanie Torrey is a Research Scientist for Trouw Nutrition in poultry science and an independent consultant in farm animal welfare, advising corporations, associations and NGOs in best animal welfare practices. Stephanie enjoys collaborating on research projects with graduate students, departmental colleagues and external partners.   

Academic History

  • B.S. in Biology, Worcester Polytechnic Institute (1997)
  • M.S. in Animal Science, Purdue University (2001)
  • Ph.D. in Animal Science, University of Guelph (2005)

Affiliations and Partnerships

  • Campbell Centre for the Study of Animal Welfare
  • International Society for Applied Ethology
  • Poultry Health Research Network
  • Poultry Science Association
  • World’s Poultry Science Association 

Recent publications

Baker, B.I., S. Torrey,  T.M. Widowski, P.V. Turner, T. Knezacek, J. Nicholds, T. Crowe and K. Schwean-Lardner. 2020. Defining characteristics of immersion CO2 gas for successful euthanasia of neonatal and young broilers. Poult. Sci.

Arrazola, A., T. Widowski, M. Guerin, E. Kiarie and S. Torrey. 2020. The effect of alternative feeding strategies on the feeding motivation of broiler breeder pullets. animal.

Mohammadigheisar, M., V.L. Shouldice, S. Torrey, T. Widowski and E. Kiarie. 2020. Comparative gastrointestinal, tibial, and plasma attributes in 48-day-old fast and slow-growing broiler chicken strains. Poult. Sci.

 Arrazola, A., E. Mosco, T. Widowski, M. Guerin, E. Kiarie and S. Torrey. 2020. The effect of alternative feeding strategies during rearing on the behaviour of broiler breeder pullets. Appl. Anim. Behav. Sci.

Bandara, R.M.A.S., S. Torrey, P.V. Turner, A. zur Linden, A. Bolinder, K. Schwean-Lardner and T.M. Widowski. 2019. Efficacy of a novel mechanical cervical dislocation device in comparison to manual cervical dislocation in layer chickens. Animals. 9(7), 407;

Arrazola, A. and S. Torrey. 2019. Conditioned place avoidance using capsuled calcium propionate as an appetite suppressant for broiler breeders. PLoS One. 14(7): e0206271. https://doi. org/10.1371/journal.pone.0206271

Arrazola, A. and S. Torrey. 2019. The development of fault bars in domestic chickens (Gallus gallus domesticus) is affected by acute stressors. Anim. Welf. 28(3):279-286.

Hernandez, E., F. James, S. Torrey, K. Schwean-Lardner, G. Monteith, T. Widowski and P.V. Turner. 2019. Electroencephalographic, physiologic and behavioural responses during cervical dislocation euthanasia in turkeys. BMC Veterinary Research. 15(1):132.

Bandara, R.M.A.S., S. Torrey, P.V. Turner, K. Schwean-Lardner and T.M. Widowski. 2019. Anatomical pathology, and behavioural and physiological responses induced by application of non-penetrating captive bolt devices in layer chickens. Front. Vet Sci. Anim. Behav. Welfare. doi: 10.3389/fvets.2019.00089

Arrazola, A., E. Mosco, T.M. Widowski, M.T. Guerin, E.G. Kiarie and S. Torrey. 2019. The Effect of Alternative Feeding Strategies for Broiler Breeder Pullets: 1. Welfare and Performance during Rearing. Poult. Sci. doi: 10.3382/ps/pez17043.  

Roehrig, C. and S. Torrey. 2019. Mortality and early feeding behavior of female turkey poults during the first week of life. Front. Vet Sci. Anim. Behav. Welfare.

Baker, B.I., S. Torrey, T.M. Widowski, P.V. Turner, T.D. Knezacek, T.G. Crowe and K. Schwean-Lardner. 2019. Evaluation of carbon dioxide induction methods for the euthanasia of day-old cull broiler chicks. Poult. Sci.  98(5): 2043–2053