O'Connor, E A, Parker, M O, McLeman, M A, Demmers, T G M, Lowe, J C, Cui, L, Davey, E L, Owen, R C, Wathes, C M, Abeyesinghe, S M, "The impact of chronic environmental stressors on growing pigs, Sus scrofa (Part 1): stress physiology, production and play behaviour", animal,