http://orgprints.org/6266/ Laying hen husbandry: group size and use of hen-runs With regard to welfare reasons, various label productions limit the number of laying hens allowed per flock. The question arose whether the group size has an influence on the use of laying hen runs. Hirt, Helen Hördegen, Philipp Zeltner, Esther 9poultry animal-husbandry-and-breeding Laying hen husbandry: group size and use of hen-runs 2005-11-11 Hirt, Helen; Hördegen, Philipp and Zeltner, Esther (2000) Laying hen husbandry: group size and use of hen-runs. International IFOAM Scientific Conference, Basel, 28 to 31 August 2000. [ Unpublished, ] application/pdf