1. Food restriction as a cause of stereotypic behaviour in tethered gilts;Appleby;Anim. Prod.,1987
2. Factors affecting the occurrence of stereotypies in stall-housed dry sows;Broom,1984
3. Feeding motivation of sows fed a sugar-beet pulp diet;Brouns;Anim. Prod.,1992
4. The effect of feeding regime and the provision of a foraging substrate on the development of behaviour in group-housed sows;Burbidge,1993