A Framework for Assessing Effects of the Food System (2015) / Chapter Skim
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ANNEX 5: Comparing Hen Housing Practices and Their Effects on Various Domains
ANNEX 5: Comparing Hen Housing Practices and Their Effects on Various Domains
Pages 353-360
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From page 353... ...
In addition, the project does not attempt to understand public attitudes toward farm animal welfare and the role that those attitudes played in consumer purchasing behavior or how an increase in the cost of eggs would affect consumer behavior. Significant knowledge gaps exist in this area.
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From page 354... ...
Cage housing greatly reduced food safety issues because the birds' excreta fell through the cage floor and was removed by belt systems from the barn, thus preventing both birds and eggs from contacting manure. In general, cage flooring is sloped to allow eggs to roll out onto an egg collection belt.
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From page 355... ...
Furnished cages, which each house a group of 20 to 60 hens, offer perches, a nest box, and an area on to which loose material is delivered to facilitate pecking, scratching, and dustbathing. As with conventional cages, the cage floor is made entirely of wire and is sloped so that the eggs roll out onto an automatic egg collection belt1 and the manure falls onto manure collection belts that remove waste from the building.
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From page 356... ...
Egg safety and quality Although a number of European studies have characterized egg quality in different hen housing systems, results have been contradictory with respect to attributes, such as egg size, shell strength, shell quality and integrity, egg interior quality, and egg nutritional quality (Holt et al., 2011)
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From page 357... ...
These lower densities are associated with greater land use and more feed consumption, thus contributing to reduced resource usage efficiency and a higher carbon footprint. Knowledge gaps included comparisons of environmental effects and footprints among the different hen housing systems in the United States, lack of process-based models for air emissions, lack of knowledge about the effectiveness of mitigation strategies, and limited understanding of interactions among environmental effects, worker safety, and hen health and welfare.
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From page 358... ...
It has more than 30 members, including research institutions, trade organizations, scientific societies, nongovernmental organizations, egg suppliers, food manufacturers, and restaurant/retail/food service companies. Leadership for the project is provided by McDonald's, Cargill, Michigan State University, the University of California, Davis, and the American Humane Association, with the American Veterinary Medical Association, the U.S.
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From page 359... ...
CFI members represent each segment of the food chain. Metrics and Data Collection The goal of CSES is to collect data to understand the magnitude of effects and the trade-offs in terms of hen welfare, worker health and safety, food affordability, environmental impacts, and egg safety and quality in different hen housing systems under U.S.
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From page 360... ...
The coalition for sustainable egg supply project: An introduction. Poultry Science.
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