Arey, D. S. 1993. The effect of bedding on the behaviour and welfare of pigs. Animal Welfare 2: 235–246.
Arey, D. S. and Franklin, M. F. 1995. Effects of straw and unfamiliarity on fighting between newly mixed growing pigs. Applied Animal Behaviour Science 45: 23–30.
Beattie, V. E., O'Connell, N. E. and Moss, B. W. 2000. Influence of environmental enrichment on the behaviour, performance and meat quality of domestic pigs. Livestock Production Science 65: 71–79.
Beattie, V. E., Sneddon, I. A. and Walker, N. 1993. Behaviour and productivity of the domestic pig in barren and enriched environments. In Livestock environment IV. Proceedings of the fourth international symposium of the American Society of Agricultural Engineers, pp. 43–50.
Beattie, V. E., Sneddon, I. A., Walker, N. and Weatherup, R. N. 2001. Environmental enrichment of intensive pig housing using spent mushroom compost. Animal Science 72: 35–42.
Beattie, V. E., Walker, N. and Sneddon, I. A. 1996. Influence of maternal experience on pig behaviour. Applied Animal Behaviour Science 46: 159–166.
Blackshaw, J. K. 1981. Some behavioural deviations in weaned domestic pigs: persistent inguinal nose thrusting, and tail and ear biting. Animal Production 33: 325–332.
Breuer, K., Sutcliffe, M. E. M., Mercer, J. T., Rance, K. A., Beattie, V. E., Sneddon, I. A. and Edwards, S. A. 2003. The effect of breed on the development of adverse social behaviours in pigs. Applied Animal Behaviour Science 84: 59–74.
Burfoot, A., Kay, R. M. and Corning, S. 1995. A scoring method to assess damage caused by aggression between sows after mixing. Animal Production 60: 564 (abstr. ).
Da, J. E. L., Burfoot, A., Docking, C. M., Whittaker, X., Spoolder, H. A. M. and Edwards, S. A. 2002. The effects of prior experience of straw and the level of straw provision on the behaviour of growing pigs. Applied Animal Behaviour Science 76: 189–202.
Day, J. E. L., Kyriazakis, I. and Lawrence, A. B. 1996. An investigation into the causation of chewing behaviour in growing pigs: the role of exploration and feeding motivation. Applied Animal Behaviour Science 48: 47–59.
Day, J. E. L., Spoolder, H. A. M. and Edwards, S. A. 2001. Straw as environmental enrichment: which properties do growing pigs find behaviourally rewarding? In Animal welfare considerations in livestock housing systems. Proceedings of the international symposium of the CIGR, second technical section, pp. 157–167.
Fraser, D. 1983/84. The role of behavior in swine production: a review of research. Applied Animal Ethology 11: 317–339.
Fraser, D. 1985. Selection of bedded and unbedded areas by pigs in relation to environmental temperature and behaviour. Applied Animal Behaviour Science 14: 117–126.
Fraser, D., Phillips, P. A., Thompson, B. K. and Tennessen, T. 1991.Effect of straw on the behaviour of growing pigs. Applied Animal Behaviour Science 30: 307–318.
Guy, J. H., Rowlinson, P., Chadwick, J. P. and Ellis, M. 2002. Growth performance and carcass characteristics of two genotypes of growing-finishing pig in three different housing systems. Animal Science 74: 493–502.
Hemsworth, P. H., Barnett, J. L., Hansen, C. and Gonyou, H. W. 1986. The influence of early contact with humans on subsequent behavioural response of pigs to humans. Applied Animal Behaviour Science 15: 55–63.
Hunter, E. J., Jones, T. A., Guise, H. J., Penny, R. H. C. and Hoste, S. 1999. Tail biting in pigs. 1. The prevalence at six UK abattoirs and the relationship of tail biting with docking, sex and other carcass damage. Pig Journal – Refereed Section 43: 18–32.
Hunter, E. J., Jones, T. A., Guise, H. J., Penny, R. H. C. and Hoste, S. 2001. The relationship between tail biting in pigs, docking procedure and other management practices. The Veterinary Journal 161: 72–79.
Jensen, M. B., Kyriazakis, I. and Lawrence, A. B. 1993. The activity and straw directed behaviour of pigs offered foods with different crude protein content. Applied Animal Behaviour Science 37: 211–221.
Jericho, K. W. F. and Church, T. L. 1972. Cannibalism in pigs. Canadian Veterinary Journal 13(7): 156–159.
Jong de, I. C., Ekkel, E. D., Burgwal van de, J. A., Lambooij, E., Korte, S. M., Ruis, M. A. W., Koolhaas, J. M. and Blokhuis, H. J. 1998. Effects of strawbedding on physiological responses to stressors and behavior in growing pigs. Physiology and Behavior 64: 303–310.
Lyons, C. A. P., Bruce, J. M., Fowler, V. R. and English, P. R. 1995. A comparison of productivity and welfare of growing pigs in four intensive systems. Livestock Production Science 43: 265–274.
McKinnon, A. J., Edwards, S. A., Stephens, D. B. and Walters, D. E. 1989. Behaviour of groups of weaner pigs in three different housing systems. British Veterinary Journal 145: 367–372.
Mench, J. A. 1998. Environmental enrichment and the importance of exploratory behavior. In Second nature: environmental enrichment for captive animals (ed. Sheperdson, D. J., Mellen, and Hutchins, .), pp. 30–46. Smithsonian Institution Press, Washington, DC.
Moinard, C., Mendl, M., Nicol, C. J. and Green, L. E. 2003. A case control study of on-farm risk factors for tail biting in pigs. Applied Animal Behaviour Science 81: 333–355.
Morgan, C. A., Deans, L. A., Lawrence, A. B. and Nielsen, B. L. 1998. The effects of straw bedding on the feeding and social behaviour of growing pigs fed by means of single-space feeders. Applied Animal Behaviour Science 58: 23–33.
Pearce, G. P., Paterson, A. M. and Pearce, A. N. 1989. The influence of pleasant and unpleasant handling and the provision of toys on the growth and behaviour of male pigs. Applied Animal Behaviour Science 23: 27–37.
Petersen, V., Simonsen, H. B. and Lawson, L. G. 1995. The effect of environmental stimulation on the development of behaviour in pigs. Applied Animal Behaviour Science 45: 215–224.
Ruiterkamp, W. A. 1985. [The behaviour of grower pigs in relation to housing systems.] Ph.D. thesis, Utrecht University, The Netherlands.
Ruiterkamp, W. A. 1987. The behaviour of grower pigs in relation to housing systems. Netherlands Journal of Agricultural Science 35: 67–70.
Rushen, J., Lawrence, A. B. and Terlouw, E. M. 1993. The motivational basis of stereotypies. In Stereotypic animal behaviour. Fundamentals and applications to welfare (ed.Lawrence, A. B. and Rushen, J.), pp. 41–65. CAB International, Wallingford.
Sambraus, H. H. 1985. Mouth-based anomalous syndromes. In World animal science. A5. Ethology of farm animals. A comprehensive study of the behavioural features of common farm animals, pp. 391–422.
Schaefer, A. L., Salomons, M. O., Tong, A. K. W., Sather, A. P. and Lepage, P. 1990. The effect of environment enrichment on aggression in newly weaned pigs. Applied Animal Behaviour Science 27: 41–52.
Schouten, W. G. P. 1987. Abnormal behaviour in piglets with espect to rearing conditions. In Welfare aspects of pig rearing (ed. Marx, D., Granvogl, A. and Smidt, D.), pp. 101–116. Commission of the European Communities, Luxembourg.
Schouten, W. G. P. 1991. Effects of rearing on subsequent performance in pigs. Pig News and Information 12: 245–247.
Schrøder-Petersen, D. L. and Simonsen, H. B. 2001. Tail biting in pigs. Veterinary Journal 162: 196–210.
Statistical Packages for the Social Sciences. 2001. SPSS, version 11.0. SPSS Inc., Chicago.
Van Putt en, G. 1969. An investigation into tail-biting among fattening pigs. British Veterinary Journal 125: 511–516.
Van de Weerd, H. A., Docking, C. M., Day, J. E. L., Avery, P. J. and Edwards, S. A. 2003. A systematic approach towards developing environmental enrichment for pigs. Applied Animal Behaviour Science 84: 101–118.
Wallgren, P. and Lindalh, E. 1996. The influence of tail biting on performance of fattening pigs. Acta Veterinaria Scandinavica 37: 453–460.
Weaver, S. A., Aherne, F. X., Meaney, M. J., Schaefer, A. L. and Dxon, W. T. 2000. Neonatal handling permanently alters hypothalamic-pituitary-adrenal axis function, behaviour, and body weight in boars. Journal of Endocrinology 164: 349–359.
Young, R. J., Carruthers, J. and Lawrence, A. B. 1994. The effect of a foraging device (the ‘Edinburgh Foodball’) on the behaviour of pigs. Applied Animal Behaviour Science 39: 237–247.
Zonderland, J. J., Fillerup, M., Van Reenen, C. G., Hopster, H. and Spoolder, H. A. M. 2003 [revention and treatment of tail biting in weaned piglets.] Praktijkrapport Varkens 18, Animal Sciences Group, Wageningen UR.