1. Effects of environmental enrichment on behaviour and productivity of growing pigs;Beattie;Anim. Welf.,1995
2. Some effects of stocking rate and group size upon agonistic behaviour in groups of growing pigs;Bryant;Br. Vet. J.,1972
3. Aggressive behaviour amongst groups of domesticated pigs kept at various stocking rates;Ewbank;Anim. Behav.,1972
4. Non-nutritive chewing by pigs: implications for tail-biting and behavioural enrichment;Feddes,1993
5. Effect of rearing environment and environmental enrichment on behaviour and neural development in young pigs;Grandin;Dis. Abst. Int.,1989