Stereotypic oral behaviors in pigs including bar-biting and rooting on concrete indicate severe welfare deprivation and are a recognized indicator of poor housing conditions.
Oral stereotypies in pigs represent a serious welfare indicator, reflecting frustration of fundamental behavioral needs. Pigs in barren concrete-floored systems spend large proportions of their time performing these abnormal behaviors instead of normal rooting, foraging, and social interaction. The development of stereotypies is associated with chronic stress and may indicate lasting neurological changes. Bar-biting can cause dental damage and oral injuries. Pigs showing high rates of stereotypies also show altered stress responses and reduced cognitive performance, suggesting genuine psychological impairment from barren housing.