The effect of individual and group housing on behavioural and physiological responses related to the welfare of pregnant pigs (1985)

Barnett, J. L., Winfield, C. G., Cronin, G. M. et al.

Abstract

These physiological data indicate a chronic stress response and a significant metabolic cost resulting from housing pigs in tethers. Single-housed pigs showed statistically greater amounts of oral-nasal behaviours (manipulation of drinkers, licking/biting pen components) than group-housed pigs.