AFAC. Alberta Farm Animal Care. Alberta Farm Animal Care Association Web site. Calgary, Canada (available at: http://www.afac.ab.ca/index.htm) (accessed February 2005).
Animal Place. Why even care about farmed animals? Animal Place Web site. Vacaville, USA (available at: http://www.animalplace.org/why.html) (accessed January 2005).
Bayvel, A.C.D. 2004. The OIE animal welfare strategic initiative - progress, priorities and prognosis. In Proc. Global conference on animal welfare: an OIE initiative, pp. 13 - 23. Paris, World Organisation for Animal Health (available at: http://www.oie.int/eng/welfare_2004/proceedings.pdf) (accessed November 2004).
Brown, K.H. 2004. A marketplace perspective. In Proc. Global conference on animal welfare: an OIE initiative, pp. 79 - 91. Paris, World Organisation for Animal Health (available at: http://www.oie.int/eng/welfare_2004/proceedings.pdf) (accessed November 2004).
Coats, C.D. 1989. Old MacDonald's factory farm. New York, USA, Continuum Publishing.
Cox, B. & Bilkei, G. 2004. Lifetime reproductive performance of sows kept outdoors in Croatia. Vet. Rec., 154: 569 - 570.
Danmarks Statistik. 2004. Landbrug 2003 (data updated 2 May 2003).
Dolan, E.F., Jr. 1986. Animal rights. New York, USA, Franklin Watts.
Edwards, S.A., Smith, W.J., Fordyce, C. & MacMenemey, F. 1994. An analysis of the causes of piglet mortality in an outdoor breeding herd. Vet. Rec., 135: 324 - 327.
FAO. 2004a. Food balance sheet. FAOSTAT database: 27 August 2004 update. Rome (available at: http://faostat.fao.org/faostat/form?collection=FBS&Domain=FBS&servlet=1&language=EN&hasbulk=1&hostname=faostat1&version=int¯oDomain=SUA%20data¯oData=Balance%20Sheet%20data) (accessed January 2005).
FAO. 2004b. Food balance sheet. FAOSTAT database: 27 August 2004 update. Rome (available at: http://faostat.external.fao.org/faostat/form?collection=FBS&Domain=FBS&servlet=1&hasbulk=0&version=ext&language=EN) (accessed January 2005).
Fraser, D. 2001a. The "New Perception" of animal agriculture: legless cows, featherless chickens, and a need for genuine analysis. J. Anim. Sci, 79: 634 - 641.
Fraser, D. 2001b. Farm animal production: changing agriculture in a changing culture. J. Appl. Anim. Welfare Sci., 4: 175 - 190.
Fraser, D. 2006. Animal welfare assurance programs in food production: a framework for assessing the options. Anim. Welfare. (in press)
Fraser, D. & Leonard, M.L. 1993. Farm animal welfare. In J. Martin, R.J. Hudson & B.A. Young, eds. Animal production in Canada, pp. 253 - 270. Edmonton, Canada, University of Alberta Faculty of Extension.
Fraser, D., Mench, J. & Millman, S. 2001. Farm animals and their welfare in 2000. In D.J. Salem & A.N. Rowan, eds. State of the animals 2001, pp. 87 - 99. Washington, DC, Humane Society Press.
Harrison, R. 1964. Animal machines. London, Vincent Stuart.
Hemsworth, P.H. & Coleman, G.J. 1998. Human - livestock interactions: the stockperson and the productivity and welfare of intensively farmed animals. Wallingford, UK, CAB International.
Humane Farming Association. Factory farming. Humane Farming Association Web site. San Rafael, USA (available at: http://www.hfa.org/factory/ index.html) (accessed January 2005).
Inge, M.T., ed. 1969. Agrarianism in American literature. New York, USA, The Odyssey Press.
Kerr, S.G.C., Wood-Gush, D.G.M., Moser, H. & Whittemore, C.T. 1988. Enrichment of the production environment and the enhancement of welfare through the use of the Edinburgh Family Pen System of Pig Production. Res. Dev. Agric., 5: 171 - 186.
Kolkman, J. 1987. Animal care: livestock and poultry on today's farm. Edmonton, Canada, Christian Farmers Federation of Alberta.
Kuehn, B.M. & Kahl, S.C. 2005. The stall in sow housing. J. Am. Vet. Med. Assoc. News, 1 January 2005 (available at: http://www.avma.org/onlnews/javma/ jan05/050101a.asp) (accessed January 2005).
Marcus, E. 1998. Vegan: the new ethics of eating. Ithaca, USA, McBooks Press.
Penman, D. 1996. The price of meat. London, Victor Gollancz.
Preece, R. & Fraser, D. 2000. The status of animals in biblical and Christian thought: a study in colliding values. Soc. Anim., 8: 245 - 263.
Preece, R. & Fraser, D., eds. 2003. Dix Harwood's "Love for animals and how it developed in Great Britain", 1928. Lampeter, UK, Edwin Mellen Press.
Robbins, J. 1987. Diet for a new America. Walpole, USA, Stillpoint Publishing.
Singer, P. 1990. Animal liberation, revised edition. New York, USA, Avon Books.
Statistics Canada. 2005. Census of Agriculture 2004 (data updated 21 January 2005) (available at: http://www.statcan.ca/english/Pgdb/agrc33a.htm).
Stevenson, P. 2004. European Union law on the welfare of farm animals. Petersfield, UK, Compassion in World Farming Trust (available at: http://www.ciwf.org. uk/publications/reports/EU_Law_2004.pdf) (accessed November 2004).
te Velde, H., Aarts, N. & van Woerkum, C. 2002. Dealing with ambivalence: farmers' and consumers' perceptions of animal welfare in livestock breeding. J. Agric. Environ. Ethics, 15: 203 - 219.
Thompson, P.B. 1998. Agricultural ethics - research, teaching, and public policy. Ames, USA, Iowa State University Press.
Thompson, P.B. 2001. The reshaping of conventional farming: a North American perspective. J. Agric. Environ. Ethics, 14: 217 - 229.
Thornton, G. 2003. WATT PoultryUSA's rankings: Broilers - turbulent 2002 leads to rationalization (available at: http://www.wattnet.com/) (subscription required) (accessed February 2005).
USDA. 2004. Poultry Yearbook. Washington, DC, United States Department of Agriculture Economic Research Service (available at: http://www.ers.usda. gov/data/sdp/view.asp?f=livestock/89007/).
Vaarst, M., Roderick, S., Lund, V., Lockertz, W. & Hovi, M. 2004. Organic principles and values: the framework for organic animal husbandry. In M. Vaarst, S. Roderick, V. Lund & W. Lockertz, eds. Animal health and welfare in organic agriculture, pp. 1 - 12. Wallingford, UK, CAB International.
Waiblinger, S. & Menke, C. 1999. Influence of herd size on human - cow relationships. Anthrozoos, 12: 240 - 247.
Webster, J. 1994. Animal welfare: a cool eye towards Eden. Oxford, UK, Blackwell Science.