References

• Baxter, M.R., 1988. Needs – behavioural or psychological?. Appl. Anim. Behav. Sci.19:345–348.
   Google Scholar
• Brambell Report, 1965. Report of the Technical Committee to enquire into the welfare of animals kept under intensive livestock husbandry systems. Her Majesty’s Stationery Office, London, UK. Broom, D.M., 1986. Indicators of poor welfare. Br. Vet. J. 142:524–526.
   Google Scholar
• Broom, D.M., 1988. Needs, freedoms and the assessment of welfare. Appl. Anim. Behav. Sci. 19:384–386.
   Google Scholar
• Broom, D.M., 1991. Animal welfare: concepts and measurement. J. Anim. Sci. 69:4167–4175.
   Google Scholar
• Broom, D.M., 1998. Welfare, stress and the evolution of feelings. Adv. Stud. Behav. 27:371–403.
   Google Scholar
• Broom, D.M., Johnson, K.G., 1993. Stress and Animal Welfare. Chapman and Hall, London, UK.
   Google Scholar
• Colborn, D.R., Thompson, D.L., Roth, T.L., Capehart, J.S., White, K.L., 1991. Responses of cortisol and prolactin to sexual excitement and stress in stallions and geldings. J. Anim. Sci. 69:2556–2562.
   Google Scholar
• Cooper, J.J., 2004. Consumer demand under commercial husbandry conditions: practical advice on measuring behavioural priorities in captive animals. Anim. Welfare 13:47–56.
   Google Scholar
• Dawkins, M.S., 1980. Animal Suffering, the Science of Animal Welfare. Chapman and Hall, London, UK.
   Google Scholar
• Dawkins, M., 1990. From an animal‘s point of view: motivation, fitness and animal welfare. Behav. Brain Sci. 13:1–61.
   Google Scholar
• Dawkins, M.S., 1993. Through Our Eyes Only? The Search for Animal Consciousness. Freeman, Oxford, UK.
   Google Scholar
• Désiré, L., Boissy, A., Veissier, I., 2002. Emotions in farm animals: a new approach to animal welfare in applied ethology. Behav. Process. 60:165–180.
   Google Scholar
• Dockès, A.C., Kling-Eveillard, F., 2006. Farmers’ and advisers’ representations of animals and animal welfare. Livest. Sci. 103: 243–249.
   Google Scholar
• Duncan, I.J.H., 2002. Poultry welfare: science or subjectivity? Brit. Poultry Sci. 43:643–652.
   Google Scholar
• Duncan, I.J.H., 2005. Science-based assessment of animal welfare: farm animals. Rev. Sci. Tech. OIE. 24:483–492.
   Google Scholar
• Duncan, I.J.H., 2006. The changing concept of animal sentience. Appl. Anim. Behav. Sci.100: 11–19.
   Google Scholar
• Duncan, I.J.H., Dawkins, M.S., 1983. The problem of assessing ‘well-being’ and ‘suffering’ in farm animals. In: D. Smidt (ed.) Indicators relevant to farm animal welfare. Martinus Nijhoff, The Hague, The Netherlands, pp 13–24.
   Google Scholar
• EFSA, 2006. The risks of poor welfare in intensive calf farming systems. An update of the Scientific Veterinary Committee Report on the Welfare of Calves. EFSA Book 366:1–36.
   Google Scholar
• FAWC, 1993. Second Report on Priorities for Research and Development in Farm Animal welfare. MAFF Publ., Tolworth, London, UK.
   Google Scholar
• Fraser, D., 1998. Encyclopedia of Animal Rights and Animal Welfare. Greenwood Press, Westport, CT, USA.
   Google Scholar
• Fraser, D., 1999. Animal ethics and animal welfare science: bridging the two cultures. Appl. Anim. Behav. Sci. 65:171–189.
   Google Scholar
• Fraser, A.F., Broom, D.B., 1997. Farm animal behaviour and welfare. CAB International, London, UK.
   Google Scholar
• Grandin, T., 1993. Livestock Handling and Transport. CAB International, Wallingford, Oxon, UK.
   Google Scholar
• Griffin, D., 1976. The Question of Animal Awareness. Rockefeller, New York, NY, USA.
   Google Scholar
• Hemsworth, P.H., Coleman, G.J., 1998. Human–livestock interactions. The stockperson and the productivity and welfare of intensively farmed animals. CAB International, Bristol, UK.
   Google Scholar
• Hewson, C.J., 2003. What is animal welfare? Common definitions and their practical consequences. Can. Vet. J. 44:496–499.
   Google Scholar
• Hughes, B.O., 1976. Behaviour as index of welfare. pp. 1005–1018 in Proc. 5th Eur. Poultry Conf., Malta.
   Google Scholar
• Hughes, B.O., Duncan, I.H.J., 1988. Behavioural needs: can they be explained in terms of motivational models? Appl. Anim. Behav. Sci. 20:352–355.
   Google Scholar
• Lund, V., Coleman, G., Gunnarsson, S., Appleby, M.C., Karkinen, K., 2006. Animal welfare science-Working at the interface between the natural and social sciences. Appl. Anim. Behav. Sci. 97:37–49.
   Google Scholar
• Millman, S.T., Duncan, I.J.H., Stauffacher, M., Stookey, J.M., 2004. The impact of applied ethologists and the International Society for Applied Ethology in improving animal welfare. Appl. Anim. Behav. Sci. 86:299–311.
   Google Scholar
• Moberg, G.P., Mench, J.A., 2000. Biology of Animal Stress: Implications for Animal Welfare. CAB International, Wallingford, Oxon, UK.
   Google Scholar
• Morton, D.B., Burghardt, G., Smith, J.A., 1990. Critical Anthropomorphism, Animal Suffering and the ecological context. Hasting’s Center Re-port Spring Issue on Animals. Ethics. Sci. Med. 20(3):13–19.
   Google Scholar
• Odendaal, J.S.J., 1998. Animal Welfare in practice. Appl. Anim. Behav. Sci. 5:93–99.
   Google Scholar
• Price, E.O., 1984. Behavioral aspects of animal domestication. Q. Rev. Biol. 59:1–32.
   Google Scholar
• Regan, T., 1983. The Case for Animal Rights. University of California Press, Berkeley, CA, USA.
   Google Scholar
• Rushen, J., Wdowski, T., Mench, J., 2003. Changing concepts of farm animal welfare: bridging the gap between applied and basic research. Appl. Anim. Behav. Sci. 81:199–214.
   Google Scholar
• Sandoe, P., Christiansen, S.B., Appleby, M.C., Webster, A.J.F., Main, D.C.J., 2003. Farm animal welfare: the interaction of ethical questions and animal welfare science. Anim. Welfare 12:469–478.
   Google Scholar
• Skinner, B.F., 1938. The Behavior of Organisms: An Experimental Analysis. Appleton-Century-Crofts, New York, NY, USA.
   Google Scholar
• Terlouw, E.M.C., Lawrence, A.B., Ladewig, J., de Passillé, A.M.B., Rushen, J., Schouten, W., 1991. A relationship between stereotypies and cortisol in sows. Behav. Process. 25:133–153.
   Google Scholar
• Tinbergen, N., 1951. The Study of Instinct. Clarendon Press, Oxford, UK.
   Google Scholar
• Toates, F., 1986. Motivational Systems. Cambridge Univ. Press, Cambridge, UK.
   Google Scholar
• Watson, J.B., 1928. Behaviorism. Routledge and Keegan Paul, London, UK.
   Google Scholar
• Weber, R.E.F., Zarate, A.V., 2005. Welfare in farm animal husbandry – current definitions and concepts as basis for practical oriented research with focus on fattening pig husbandry. Arch. Tierzucht. 48:475–489.
   Google Scholar
• Webster, J., 1994. Animal Welfare - A cool eye towards eden. Blackwell Science, Oxford, UK.
   Google Scholar
• Webster, J., 2006. Animal sentience and animal welfare: What is it to them and what is it to us? Appl. Anim. Behav. Sci. 100: 1–3.
   Google Scholar
• WHO, 1946. Preamble to the Constitution of the World Health Organization as adopted by the International Health Conference, New York, June 19–22, 1946. Official Records of the World Health Organization, no. 2.
   Google Scholar
• Wiepkema, P.R., 1987. Behavioural aspects of stress. In: P.R. Wiepkema and P.W.M. Van Adrichem (eds.) Biology of Stress in Farm Animals: An Integrative Approach. Martinus Nijhoff, Dordrecht, The Netherlands, pp 113–133.
   Google Scholar
• Wood-Gush, D.G.M., Duncan, I.J.H., Fraser, D., 1975. Social stress and welfare problems in agricultural animals. In: E.S.E. Hafez (ed.) The Behaviour of Domestic Animals. Tindall and Cassell, London, UK, pp 182–200.
   Google Scholar