The effects of laying hen housing systems on egg safety and quality

2017 ◽  
pp. 195-213
Author(s):  
Deana R. Jones ◽  
Keyword(s):  
Laying Hen ◽  
Housing Systems

scholarly journals Laying hen mortality in different indoor housing systems: a meta-analysis of data from commercial farms in 16 countries

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cynthia Schuck-Paim ◽  
Elsa Negro-Calduch ◽  
Wladimir J. Alonso
Keyword(s):  
Production Systems ◽  
Meta Analysis ◽  
Animal Health ◽  
Laying Hen ◽  
Egg Laying ◽  
Housing Systems ◽  
Commercial Farms ◽  
Degree Of Maturity ◽  
Using Data ◽  
Average Drop

AbstractSocietal concern with the welfare of egg laying hens housed in conventional cages is fostering a transition towards cage-free systems in many countries. However, although cage-free facilities enable hens to move freely and express natural behaviours, concerns have also been raised over the possibility that cage-free flocks experience higher mortality, potentially compromising some aspects of their welfare. To investigate this possibility, we conducted a large meta-analysis of laying hen mortality in conventional cages, furnished cages and cage-free aviaries using data from 6040 commercial flocks and 176 million hens from 16 countries. We show that except for conventional cages, mortality gradually drops as experience with each system builds up: since 2000, each year of experience with cage-free aviaries was associated with a 0.35–0.65% average drop in cumulative mortality, with no differences in mortality between caged and cage-free systems in more recent years. As management knowledge evolves and genetics are optimized, new producers transitioning to cage-free housing may experience even faster rates of decline. Our results speak against the notion that mortality is inherently higher in cage-free production and illustrate the importance of considering the degree of maturity of production systems in any investigations of farm animal health, behaviour and welfare.

scholarly journals Thermal environment characterization of laying hen-housing systems

2022 ◽  
Vol 10 (1) ◽  
pp. 1-9
Author(s):  
Nágela Maria Henrique Mascarenhas ◽  
Dermeval Araújo Furtado ◽  
Bonifácio Benício de Souza ◽  
Airton Gonçalves de Oliveira ◽  
Antonio Nelson Lima da Costa ◽  
...  
Keyword(s):  
Thermal Environment ◽  
Laying Hen ◽  
Housing Systems

scholarly journals Eggshell characteristics and cuticle deposition in three laying hen genotypes housed in enriched cages and on litter

2017 ◽  
Vol 63 (No. 1) ◽  
pp. 11-16 ◽  
Author(s):  
M. Ketta ◽  
E. Tumova
Keyword(s):  
Laying Hens ◽  
Quality Parameters ◽  
Laying Hen ◽  
Housing System ◽  
Eggshell Thickness ◽  
System Effect ◽  
Egg Weight ◽  
Housing Systems ◽  
Eggshell Quality ◽  
System P

The objective of the present study was to compare the eggshell characteristics and cuticle deposition of Lohmann Brown, Hy-Line Silver Brown, and Isa Brown layers kept in two different housing systems. The three laying hen genotypes were housed in enriched cages (100 hens, 750 cm<sup>2</sup>/hen, 10 hens/cage) and in littered pens (100 hens, 9 hens/m<sup>2</sup>, 10 hens/pen). The experiment was carried out in weeks 40–56 of hens age. Non-significant interactions of genotype and housing system for eggshell quality parameters and cuticle deposition were detected in this study. Egg weight was significantly affected by genotype (P ≤ 0.001) and housing system (P ≤ 0.043). The heaviest eggs were laid by Lohmann Brown, while the lightest eggs were produced by Hy-Line Silver Brown. Eggshell strength was not affected by genotype and housing system, however, genotype had a significant effect on eggshell thickness (P ≤ 0.033). Isa Brown eggs had thicker eggshells compared to Lohmann Brown and Hy-Line Silver Brown. However, a non-significant effect of housing system on eggshell thickness was observed. Eggshell percentage was significantly affected by both genotype and housing system. Genotype of laying hens had a significant effect on cuticle deposition; significantly higher cuticle deposition was observed in Lohmann Brown eggs (P ≤ 0.001). It could be concluded that genotype had a significant effect on eggshell quality parameters and cuticle deposition. However, the housing system effect was less important in these characteristics.

scholarly journals Influence of commercial laying hen housing systems on the incidence and identification of Salmonella and Campylobacter

2016 ◽  
Vol 95 (5) ◽  
pp. 1116-1124 ◽  
Author(s):  
D.R. Jones ◽  
J. Guard ◽  
R.K. Gast ◽  
R.J. Buhr ◽  
P.J. Fedorka-Cray ◽  
...  
Keyword(s):  
Laying Hen ◽  
Housing Systems

scholarly journals Impact of commercial housing systems and nutrient and energy intake on laying hen performance and egg quality parameters

2015 ◽  
Vol 94 (3) ◽  
pp. 485-501 ◽  
Author(s):  
D.M. Karcher ◽  
D.R. Jones ◽  
Z. Abdo ◽  
Y. Zhao ◽  
T.A. Shepherd ◽  
...  
Keyword(s):  
Energy Intake ◽  
Egg Quality ◽  
Quality Parameters ◽  
Laying Hen ◽  
Housing Systems ◽  
Commercial Housing

Modelling ventilation rate, balance temperature and supplemental heat need in alternative vs. conventional laying-hen housing systems

2013 ◽  
Vol 115 (3) ◽  
pp. 311-323 ◽  
Author(s):  
Yang Zhao ◽  
Hongwei Xin ◽  
Timothy A. Shepherd ◽  
Morgan D. Hayes ◽  
John P. Stinn
Keyword(s):  
Ventilation Rate ◽  
Laying Hen ◽  
Housing Systems

scholarly journals Air Quality in Alternative Housing Systems May Have an Impact on Laying Hen Welfare. Part I—Dust

Animals ◽  
2015 ◽  
Vol 5 (3) ◽  
pp. 495-511 ◽  
Author(s):  
Bruce David ◽  
Randi Moe ◽  
Virginie Michel ◽  
Vonne Lund ◽  
Cecilie Mejdell
Keyword(s):  
Air Quality ◽  
Laying Hen ◽  
Alternative Housing ◽  
Housing Systems
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