Rearing of pigs in groups is more prominent under commercial farming practices. This offers benefits which include the use of labour-saving machinery and bedding systems, and practicing of all-in-all-out production which facilitates health management (Turner et al., 2003). When pigs are in groups, they exhibit aggressive behaviours more often to establish ranks and also to compete for limited resources (feed and water). These behaviours cause injuries to pigs which lead to mortalities and also reduction in weight gain. Fibrous feedstuffs are expected to reduce aggressive behaviours. The