Date of Award
Doctor of Philosophy
Agricultural and Biosystems Engineering
Husbandry practices for egg production vary throughout the world. Current production systems are typically classified as caged, cage-free, or free range in terms of housing style. The research presented supplements the existing knowledge base for laying-hen housing. Where possible, a systematic assessment approach was used in the comprehensive literature review, and combined field monitoring and controlled-environment laboratory studies. The results of this research demonstrate: differing environmental conditions and hen health under different housing schemes with varying weather; no difference in heat and moisture production for varying stocking density and group size; no clear advantage of offering additional space for coping with heat challenge; and the design and initial application of a preference chamber for assessing environmental preferences of laying hens.
Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/
Angela Renee Green
Green, Angela Renee, "A systematic evaluation of laying hen housing for improved hen welfare" (2008). Retrospective Theses and Dissertations. 15861.