G. Archer and G. House, “Effects of Shower-Based Environmental Enrichment During a 35-Day Grow-Out Period on Production Performance, Stress Physiology, Fear Responses and Gut Health in Pekin Ducks”, Int. J. Poult. Sci., vol. 25, pp. 106–113, Jun. 2026, doi: 10.66920/ijps.2026.106.113.