Liebers, Christopher J The influence of environmental enrichment and stocking density on the plumage and health conditions of laying hen pullets. [electronic resource] - Poultry science Jun 2019 - 2474-2488 p. digital Publication Type: Comparative Study; Journal Article ISSN: 1525-3171 Standard No.: 10.3382/ps/pez024 doi Subjects--Topical Terms: Animal Husbandry--methodsAnimalsChickens--physiologyFeathers--physiologyFemaleGermanyHousing, AnimalMicroclimatePopulation Density