Research graph
References from Egg laying hens in indoor systems. Local targets link to admitted publications; unresolved targets remain external evidence.
Effect of perches at different positions in conventional cages for laying hens of two different strains
1993 · External reference
Effect of foraging material and food form on feather pecking in laying hens
10.1080/00071660086349 · 2000 · External reference
A risk assessment of health, production, and resource occupancy for 4 laying hen strains across the lay cycle in a commercial-style aviary system
10.1016/j.psj.2020.05.057 · 2020 · External reference
Genetic aspects of keel bone deformities and fractures determined by palpation in laying hens
2017 · External reference
The European Union ban on conventional cages for laying hens: History and prospects
10.1207/s15327604jaws0602_03 · 2003 · External reference
Unresolved reference
External reference
The effect of piling behavior on the production and mortality of free-range laying hens
10.1016/j.psj.2023.102989 · 2023 · External reference
Unresolved reference
External reference
Inheritance of bone characteristics affecting osteoporosis in laying hens
10.1080/00071660086376 · 2000 · External reference
Feather-pecking in poultry: Its relation with ground-pecking
10.1016/0168-1591(86)90040-7 · 1986 · External reference
Some observations on the development of feather-pecking in poultry
10.1016/0168-1591(84)90104-7 · 1984 · External reference
The LayWel project: Welfare implications of changes in production systems for laying hens
10.1017/s0043933907001328 · 2007 · External reference
Unresolved reference
External reference
Short communications: Smothering in commercial free-range laying hens: A preliminary investigation
10.1136/vr.c7462 · 2011 · External reference
Omnivores going astray: A review and new synthesis of abnormal behavior in pigs and laying hens
10.3389/fvets.2016.00057 · 2016 · External reference
Rate of growth and calcification of the sternum of male and female new hampshire chickens having crooked keels
10.3382/ps.0280289 · 1949 · External reference
Identification of quantitative trait loci for receiving pecks in young and adult laying hens
10.1093/ps/82.11.1661 · 2003 · External reference
The gut-brain axis interactions during heat stress and avian necrotic enteritis
10.3382/ps/pew021 · 2016 · External reference
Failed landings after laying hen flight in a commercial aviary over two flock cycles
10.3382/ps/pev270 · 2016 · External reference
Susceptibility to keel bone fractures in laying hens and the role of genetic variation
10.3382/ps/pex146 · 2017 · External reference
Dietary protein restriction stress in the domestic chicken (Gallus gallus domesticus) induces remodeling of adrenal steroidogenic tissue that supports hyperfunction
10.1006/gcen.2000.7534 · 2000 · External reference
Opportunities for exercise during pullet rearing, Part I: Effect on the musculoskeletal characteristics of pullets
10.3382/ps/pex059 · 2017 · External reference
Bone fracture incidence in end-of-lay high-producing, noncommercial laying hens identified using radiographs
10.3382/ps.2008-00115 · 2008 · External reference
Secretion of radioactive calcium in the hen's egg
1949 · External reference
Unresolved reference
External reference
Feather pecking in laying hens housed in free-range or furnished-cage systems on French farms
10.1080/00071668.2019.1639137 · 2019 · External reference
Cage layer fatigue
1955 · External reference
Medullary bone and avian calcium regulation
10.1242/jeb.184.1.63 · 1993 · External reference
Sustainability challenges and innovations in the Dutch egg sector
10.1016/j.jclepro.2020.120974 · 2020 · External reference
Social discrimination and aggression by laying hens in large groups: From peck orders to social tolerance
10.1016/j.applanim.2003.08.010 · 2003 · External reference
A cross-sectional study on feather cover damage in Canadian laying hens in non-cage housing systems
10.1186/s12917-019-2168-2 · 2019 · External reference
Ecological and economic evaluation of Dutch egg production systems
10.1016/j.livsci.2011.03.011 · 2011 · External reference
The effects of four types of enrichment on feather-pecking behaviour in laying hens housed in barren environments
10.1017/s0962728600001913 · 2010 · External reference
The influence of strain and environmental factors upon feather pecking and cannibalism in fowls
10.1080/00071667208415981 · 1972 · External reference
Adaptation of the kidney during reproduction: Role of estrogen in the regulation of responsiveness to parathyroid hormone
10.3382/ps.0721548 · 1993 · External reference
Half a century of egg production – The industry's development from 1962 to 2012
2002 · External reference
Housing and husbandry of laying hens: Past, present, and future
2011 · External reference
10.4060/cb4474en
10.4060/cb4474en · External reference
Incidence, pathology and prevention of keel bone deformities in the laying hen
10.1080/00071660410001730815 · 2004 · External reference
Causes of mortality in laying hens in different housing systems in 2001 to 2004
10.1186/1751-0147-51-3 · 2009 · External reference
Behaviour and welfare of individual laying hens in a non-cage system
10.1080/0007166031000085391 · 2003 · External reference
Causes of normal mortality in commercial egg-laying chickens
10.1637/11556-120816-regr · 2017 · External reference
A survey about the welfare problem “toe pecking” in Swiss laying hens
10.1016/j.applanim.2023.105854 · 2023 · External reference
What is causing smothering in laying hens?
10.1136/vr.i4618 · 2016 · External reference
Pecking and piling: The behaviour of conventional layer hybrids and dual-purpose hens in the nest
10.1016/j.applanim.2019.02.016 · 2019 · External reference
The effect of rearing environment on feather pecking in young and adult laying hens
10.1016/j.applanim.2013.07.014 · 2013 · External reference
Assessing environmental control strategies in cage-free egg production systems: Effect on spatial occupancy and natural behaviors
2021 · External reference
Why do hens pile? Hypothesizing the causes and consequences
10.3389/fvets.2020.616836 · 2020 · External reference
Broken bones in domestic fowl: Handling and processing damage in end-of-lay battery hens
10.1080/00071668908417179 · 1989 · External reference
Broken bones in domestic fowls: Effect of husbandry system and stunning method in end-of-lay hens
10.1080/00071669008417231 · 1990 · External reference
End of lay postmortem findings in aviary housed laying hens
10.1016/j.psj.2022.102332 · 2023 · External reference
Coup in the coop: Rank changes in chicken dominance hierarchies over maturation
10.1016/j.beproc.2023.104904 · 2023 · External reference
Nervousness and hysteria of mature female chickens
10.3382/ps.0550531 · 1976 · External reference
Causes of keel bone damage and their solutions in laying hens
10.1017/s0043933915002135 · 2015 · External reference
Risk factors associated with keel bone and foot pad disorders in laying hens housed in aviary systems
10.3382/ps/pev339 · 2016 · External reference
Extreme crowding in laying hens during a recurrent smothering outbreak
10.1002/vetr.245 · 2021 · External reference
The impact of different housing systems on egg safety and quality
10.3382/ps.2010-00794 · 2011 · External reference
10.18174/583668
10.18174/583668 · External reference
Sodium deprivation, feather pecking and activity in laying hens
10.1080/00071667408416131 · 2007 · External reference
Providing laying hens in group-housed enriched cages with access to barley silage reduces aggressive and feather-pecking behaviour
10.1139/cjas-2015-0133 · 2016 · External reference
Genetics of tibia bone properties of crossbred commercial laying hens in different housing systems
10.1093/g3journal/jkac302 · 2023 · External reference
Incidence, severity, and welfare implications of lesions observed postmortem in laying hens from commercial noncage farms in California and Iowa
10.1637/11247-080415-reg.1 · 2016 · External reference
Effects of housing, perches, genetics, and 25-hydroxycholecalciferol on keel bone deformities in laying hens
10.3382/ps.2011-01379 · 2011 · External reference
Feather pecking and cannibalism in non-beak-trimmed laying hen flocks—Farmers’ perspectives
10.3390/ani9020043 · 2019 · External reference
Feather pecking and cannibalism in free-range laying hens as affected by genotype, dietary level of methionine + cystine, light intensity during rearing and age at first access to the range area
10.1016/s0168-1591(01)00209-x · 2002 · External reference
A note on the physiological and behavioural consequences of cannibalistic toe pecking in laying hens (Gallus gallus domesticus)
10.1016/s0003-9098(25)00768-4 · 2011 · External reference
Partial budget analysis of laying hens’ transition from cages to production systems of improved welfare: A case study in Greece
10.1080/00071668.2024.2360631 · 2024 · External reference
Hen welfare in different housing systems
10.3382/ps.2010-00962 · 2011 · External reference
Correlates and consequences of allopecking in white leghorn chickens
10.1016/0168-1591(94)00551-o · 1995 · External reference
Understanding the causes of keel bone damage and its effects on the welfare of laying hens
10.3390/ani14243655 · 2024 · External reference
Behavioural assessment of flicker fusion frequency in chicken Gallus gallus domesticus
10.1016/j.visres.2011.04.009 · 2011 · External reference
Unresolved reference
External reference
Effects of housing system on the costs of commercial egg production
10.3382/ps/peu011 · 2015 · External reference
Laying hens: Why smothering and not surviving?—A literature review
10.3390/ani14111518 · 2024 · External reference
Ingestion of Lactobacillus rhamnosus modulates chronic stress-induced feather pecking in chickens
10.1038/s41598-021-96615-x · 2021 · External reference
Unresolved reference
External reference
The effect of keel fractures on egg-production parameters, mobility and behaviour in individual laying hens
10.7120/096272812799129376 · 2012 · External reference
Do laying hens with keel bone fractures experience pain?
10.1371/journal.pone.0042420 · 2012 · External reference
10.1079/9780851998138.0239
10.1079/9780851998138.0239 · External reference
Effects of stocking density, flock size and management on the welfare of laying hens in single-tier aviaries
10.1080/00071660600610609 · 2006 · External reference
10.2903/j.efsa.2023.7789
10.2903/j.efsa.2023.7789 · External reference
Osteoporosis induced by unilateral wing immobilization
1972 · External reference
Consumer perceptions of egg-laying hen housing systems
10.3382/ps/pey205 · 2018 · External reference
Night-time roosting in laying hens and the effect of thwarting access to perches
10.1016/s0168-1591(00)00097-6 · 2000 · External reference
Trabecular bone contributes to strength of the proximal femur under mediolateral impact in the avian
10.1115/1.1835366 · 2005 · External reference
On-farm comparison of keel fracture prevalence and other welfare indicators in conventional cage and floor-housed laying hens in Ontario, Canada
10.3382/ps/pev039 · 2014 · External reference
Effect of rearing environment on bone growth of pullets
10.3382/ps/peu041 · 2015 · External reference
Comparisons of bone properties and keel deformities between strains and housing systems in end-of-lay hens
10.3382/ps/pew199 · 2016 · External reference
Housing conditions alter properties of the tibia and humerus during the laying phase in Lohmann white Leghorn hens
10.3382/ps/pev209 · 2016 · External reference
Assessing behavior in Aseel pullets under free-range, part-time free-range, and cage system during growing phase
10.3382/ps/pex355 · 2018 · External reference
Panic in free-range laying hens
10.1136/vr.100685 · 2012 · External reference
Can short-term frustration facilitate feather pecking in laying hens?
10.1016/j.applanim.2004.08.023 · 2005 · External reference
The prevention and control of feather pecking in laying hens: Identifying the underlying principles
10.1017/s0043933913000354 · 2013 · External reference
Welfare of layers housed in small furnished cages on Danish commercial farms: The condition of keel bone, feet, plumage and skin
10.1080/00071668.2018.1533632 · 2019 · External reference
Keel bone fractures affect egg laying performance but not egg quality in laying hens housed in a commercial aviary system
10.3382/ps/pey544 · 2019 · External reference
Keel bone fractures in laying hens: A systematic review of prevalence across age, housing systems, and strains
10.1093/jas/skaa145 · 2020 · External reference
Providing laying hens with perches: Fulfilling behavioural needs but causing injury?
10.1080/00071660903110844 · 2009 · External reference
Feather pecking and cannibalism
10.1079/wps19950016 · 1995 · External reference
Laying hen mortality in different indoor housing systems: A meta-analysis of data from commercial farms in 16 countries
10.1038/s41598-021-81868-3 · 2021 · External reference
Risk factors for the occurrence of feather pecking in non-beak-trimmed pullets and laying hens on commercial farms
10.3390/app12199699 · 2022 · External reference
Life cycle assessment of egg production: Effects of breed and feeding a low-protein diet with amino acids during laying period
10.1111/asj.70129 · 2025 · External reference
Environmental assessment of three egg production systems- Part II. Ammonia, greenhouse gas, and particulate matter emissions
10.3382/ps/peu075 · 2015 · External reference
Fatty liver haemorrhagic syndrome occurrence in laying hens: Impact of production system
10.1080/03079457.2018.1538550 · 2019 · External reference
The influence of severe prolonged exercise restriction on the mechanical and structural properties of bone in an avian model
10.1016/j.tvjl.2008.11.015 · 2010 · External reference
Characterising free-range layer flocks using unsupervised cluster analysis
10.3390/ani10050855 · 2020 · External reference
Social behavior of the fowl
10.3382/ps.0550005 · 1976 · External reference
Modification of aviary design reduces incidence of falls, collisions and keel bone damage in laying hens
10.1016/j.applanim.2015.01.012 · 2015 · External reference
Soft perches in an aviary system reduce incidence of keel bone damage in laying hens
10.1371/journal.pone.0122568 · 2015 · External reference
Synergistic effect of progesterone, testosterone, and estradiol in the stimulation of chick renal 25- hydroxyvitamin D3-lα-hydroxylase
10.1210/endo-103-6-2035 · 1978 · External reference
Pathological characterization of keel bone fractures in laying hens does not support external trauma as the underlying cause
10.1371/journal.pone.0229735 · 2020 · External reference
Use of location tracking to link egg production with toe pecking injuries, feather quality, body mass in laying hens
10.1016/j.japr.2025.100603 · 2025 · External reference
Development of an ex vivo protocol to model bone fracture in laying hens resulting from collisions
10.1371/journal.pone.0066215 · 2013 · External reference
Differences in feed formulation are more determining of life cycle environmental impacts in U.S. egg production systems than are resource use efficiency and housing system choice
10.1016/j.jclepro.2025.147032 · 2025 · External reference
Unresolved reference
External reference
Unresolved reference
External reference
Early-life microbiota transplantation affects behavioural responses, serotonin and immune characteristics in chicken lines divergently selected on feather pecking
10.1038/s41598-020-59125-w · 2020 · External reference
Impact of feeding management on feather pecking in laying hens
10.1079/wps200478 · 2005 · External reference
A meta-analysis on the effect of environmental enrichment on feather pecking and feather damage in laying hens
10.1016/j.psj.2020.11.006 · 2021 · External reference
Production, egg quality, bone strength, claw length, and keel bone deformities of laying hens housed in furnished cages with different group sizes
10.1093/ps/84.10.1511 · 2005 · External reference
The potential value of morning and afternoon feeds for laying hens
10.1093/japr/9.1.98 · 2000 · External reference
Physiologic and genetic studies of crooked keels in chickens
1937 · External reference
Welfare implications of avian osteoporosis
10.1093/ps/83.2.184 · 2004 · External reference
Implications for welfare, productivity and sustainability of the variation in reported levels of mortality for laying hen flocks kept in different housing systems: A meta-analysis of ten studies
10.1371/journal.pone.0146394 · 2016 · External reference
Overview of bone biology in the egg-laying hen
10.1093/ps/83.2.193 · 2004 · External reference
Osteoporosis in cage layers
10.1093/ps/79.7.1033 · 2000 · External reference
The influence of losing or gaining access to peat on the dustbathing behaviour of laying hens
10.1017/s0962728600000294 · 2009 · External reference
Investigation of palpation as a method for determining the prevalence of keel and furculum damage in laying hens
10.1136/vr.155.18.547 · 2004 · External reference
Influence of housing system and design on bone strength and keel bone fractures in laying hens
10.1136/vr.d4831 · 2011 · External reference
Piling behaviour in Swiss layer flocks: Description and related factors
10.1016/j.applanim.2021.105272 · 2021 · External reference
The potential of a light spot, heat area, and novel object to attract laying hens and induce piling behaviour
10.1016/j.animal.2022.100567 · 2022 · External reference
Environmental impacts and sustainability of egg production systems
10.3382/ps.2010-00877 · 2011 · External reference
Spatial distribution, movement, body damage, and feather condition of laying hens in a multi-tier system
10.1016/j.psj.2023.103202 · 2024 · External reference
Environmental assessment of three egg production systems–Part I: Monitoring system and indoor air quality
10.3382/ps/peu076 · 2015 · External reference
Extreme crowding in laying hens during a recurrent smothering outbreak
10.1002/vetr.245 · ExternalCitation · doi-reference
Dietary protein restriction stress in the domestic chicken (Gallus gallus domesticus) induces remodeling of adrenal steroidogenic tissue that supports hyperfunction
10.1006/gcen.2000.7534 · ExternalCitation · doi-reference
Some observations on the development of feather-pecking in poultry
10.1016/0168-1591(84)90104-7 · ExternalCitation · doi-reference
Feather-pecking in poultry: Its relation with ground-pecking
10.1016/0168-1591(86)90040-7 · ExternalCitation · doi-reference
Correlates and consequences of allopecking in white leghorn chickens
10.1016/0168-1591(94)00551-o · ExternalCitation · doi-reference
The potential of a light spot, heat area, and novel object to attract laying hens and induce piling behaviour
10.1016/j.animal.2022.100567 · ExternalCitation · doi-reference
Social discrimination and aggression by laying hens in large groups: From peck orders to social tolerance
10.1016/j.applanim.2003.08.010 · ExternalCitation · doi-reference
Can short-term frustration facilitate feather pecking in laying hens?
10.1016/j.applanim.2004.08.023 · ExternalCitation · doi-reference
The effect of rearing environment on feather pecking in young and adult laying hens
10.1016/j.applanim.2013.07.014 · ExternalCitation · doi-reference
Modification of aviary design reduces incidence of falls, collisions and keel bone damage in laying hens
10.1016/j.applanim.2015.01.012 · ExternalCitation · doi-reference
Pecking and piling: The behaviour of conventional layer hybrids and dual-purpose hens in the nest
10.1016/j.applanim.2019.02.016 · ExternalCitation · doi-reference
Piling behaviour in Swiss layer flocks: Description and related factors
10.1016/j.applanim.2021.105272 · ExternalCitation · doi-reference
A survey about the welfare problem “toe pecking” in Swiss laying hens
10.1016/j.applanim.2023.105854 · ExternalCitation · doi-reference
Coup in the coop: Rank changes in chicken dominance hierarchies over maturation
10.1016/j.beproc.2023.104904 · ExternalCitation · doi-reference
Use of location tracking to link egg production with toe pecking injuries, feather quality, body mass in laying hens
10.1016/j.japr.2025.100603 · ExternalCitation · doi-reference
Sustainability challenges and innovations in the Dutch egg sector
10.1016/j.jclepro.2020.120974 · ExternalCitation · doi-reference
Differences in feed formulation are more determining of life cycle environmental impacts in U.S. egg production systems than are resource use efficiency and housing system choice
10.1016/j.jclepro.2025.147032 · ExternalCitation · doi-reference
Ecological and economic evaluation of Dutch egg production systems
10.1016/j.livsci.2011.03.011 · ExternalCitation · doi-reference
A risk assessment of health, production, and resource occupancy for 4 laying hen strains across the lay cycle in a commercial-style aviary system
10.1016/j.psj.2020.05.057 · ExternalCitation · doi-reference
A meta-analysis on the effect of environmental enrichment on feather pecking and feather damage in laying hens
10.1016/j.psj.2020.11.006 · ExternalCitation · doi-reference
End of lay postmortem findings in aviary housed laying hens
10.1016/j.psj.2022.102332 · ExternalCitation · doi-reference
The effect of piling behavior on the production and mortality of free-range laying hens
10.1016/j.psj.2023.102989 · ExternalCitation · doi-reference
Spatial distribution, movement, body damage, and feather condition of laying hens in a multi-tier system
10.1016/j.psj.2023.103202 · ExternalCitation · doi-reference
The influence of severe prolonged exercise restriction on the mechanical and structural properties of bone in an avian model
10.1016/j.tvjl.2008.11.015 · ExternalCitation · doi-reference
Behavioural assessment of flicker fusion frequency in chicken Gallus gallus domesticus
10.1016/j.visres.2011.04.009 · ExternalCitation · doi-reference
A note on the physiological and behavioural consequences of cannibalistic toe pecking in laying hens (Gallus gallus domesticus)
10.1016/s0003-9098(25)00768-4 · ExternalCitation · doi-reference
Night-time roosting in laying hens and the effect of thwarting access to perches
10.1016/s0168-1591(00)00097-6 · ExternalCitation · doi-reference
Feather pecking and cannibalism in free-range laying hens as affected by genotype, dietary level of methionine + cystine, light intensity during rearing and age at first access to the range area
10.1016/s0168-1591(01)00209-x · ExternalCitation · doi-reference
The LayWel project: Welfare implications of changes in production systems for laying hens
10.1017/s0043933907001328 · ExternalCitation · doi-reference
The prevention and control of feather pecking in laying hens: Identifying the underlying principles
10.1017/s0043933913000354 · ExternalCitation · doi-reference
Causes of keel bone damage and their solutions in laying hens
10.1017/s0043933915002135 · ExternalCitation · doi-reference
The influence of losing or gaining access to peat on the dustbathing behaviour of laying hens
10.1017/s0962728600000294 · ExternalCitation · doi-reference
The effects of four types of enrichment on feather-pecking behaviour in laying hens housed in barren environments
10.1017/s0962728600001913 · ExternalCitation · doi-reference
Early-life microbiota transplantation affects behavioural responses, serotonin and immune characteristics in chicken lines divergently selected on feather pecking
10.1038/s41598-020-59125-w · ExternalCitation · doi-reference
Laying hen mortality in different indoor housing systems: A meta-analysis of data from commercial farms in 16 countries
10.1038/s41598-021-81868-3 · ExternalCitation · doi-reference
Ingestion of Lactobacillus rhamnosus modulates chronic stress-induced feather pecking in chickens
10.1038/s41598-021-96615-x · ExternalCitation · doi-reference
10.1079/9780851998138.0239
10.1079/9780851998138.0239 · ExternalCitation · doi-reference
Feather pecking and cannibalism
10.1079/wps19950016 · ExternalCitation · doi-reference
Impact of feeding management on feather pecking in laying hens
10.1079/wps200478 · ExternalCitation · doi-reference
Effect of foraging material and food form on feather pecking in laying hens
10.1080/00071660086349 · ExternalCitation · doi-reference
Inheritance of bone characteristics affecting osteoporosis in laying hens
10.1080/00071660086376 · ExternalCitation · doi-reference
Behaviour and welfare of individual laying hens in a non-cage system
10.1080/0007166031000085391 · ExternalCitation · doi-reference
Incidence, pathology and prevention of keel bone deformities in the laying hen
10.1080/00071660410001730815 · ExternalCitation · doi-reference
Effects of stocking density, flock size and management on the welfare of laying hens in single-tier aviaries
10.1080/00071660600610609 · ExternalCitation · doi-reference
Providing laying hens with perches: Fulfilling behavioural needs but causing injury?
10.1080/00071660903110844 · ExternalCitation · doi-reference
The influence of strain and environmental factors upon feather pecking and cannibalism in fowls
10.1080/00071667208415981 · ExternalCitation · doi-reference
Sodium deprivation, feather pecking and activity in laying hens
10.1080/00071667408416131 · ExternalCitation · doi-reference
Welfare of layers housed in small furnished cages on Danish commercial farms: The condition of keel bone, feet, plumage and skin
10.1080/00071668.2018.1533632 · ExternalCitation · doi-reference
Feather pecking in laying hens housed in free-range or furnished-cage systems on French farms
10.1080/00071668.2019.1639137 · ExternalCitation · doi-reference
Partial budget analysis of laying hens’ transition from cages to production systems of improved welfare: A case study in Greece
10.1080/00071668.2024.2360631 · ExternalCitation · doi-reference
Broken bones in domestic fowl: Handling and processing damage in end-of-lay battery hens
10.1080/00071668908417179 · ExternalCitation · doi-reference
Broken bones in domestic fowls: Effect of husbandry system and stunning method in end-of-lay hens
10.1080/00071669008417231 · ExternalCitation · doi-reference
Fatty liver haemorrhagic syndrome occurrence in laying hens: Impact of production system
10.1080/03079457.2018.1538550 · ExternalCitation · doi-reference
Genetics of tibia bone properties of crossbred commercial laying hens in different housing systems
10.1093/g3journal/jkac302 · ExternalCitation · doi-reference
The potential value of morning and afternoon feeds for laying hens
10.1093/japr/9.1.98 · ExternalCitation · doi-reference
Keel bone fractures in laying hens: A systematic review of prevalence across age, housing systems, and strains
10.1093/jas/skaa145 · ExternalCitation · doi-reference
Osteoporosis in cage layers
10.1093/ps/79.7.1033 · ExternalCitation · doi-reference
Identification of quantitative trait loci for receiving pecks in young and adult laying hens
10.1093/ps/82.11.1661 · ExternalCitation · doi-reference
Welfare implications of avian osteoporosis
10.1093/ps/83.2.184 · ExternalCitation · doi-reference
Overview of bone biology in the egg-laying hen
10.1093/ps/83.2.193 · ExternalCitation · doi-reference
Production, egg quality, bone strength, claw length, and keel bone deformities of laying hens housed in furnished cages with different group sizes
10.1093/ps/84.10.1511 · ExternalCitation · doi-reference
Life cycle assessment of egg production: Effects of breed and feeding a low-protein diet with amino acids during laying period
10.1111/asj.70129 · ExternalCitation · doi-reference
Trabecular bone contributes to strength of the proximal femur under mediolateral impact in the avian
10.1115/1.1835366 · ExternalCitation · doi-reference
Panic in free-range laying hens
10.1136/vr.100685 · ExternalCitation · doi-reference
Investigation of palpation as a method for determining the prevalence of keel and furculum damage in laying hens
10.1136/vr.155.18.547 · ExternalCitation · doi-reference
Short communications: Smothering in commercial free-range laying hens: A preliminary investigation
10.1136/vr.c7462 · ExternalCitation · doi-reference
Influence of housing system and design on bone strength and keel bone fractures in laying hens
10.1136/vr.d4831 · ExternalCitation · doi-reference
What is causing smothering in laying hens?
10.1136/vr.i4618 · ExternalCitation · doi-reference
Providing laying hens in group-housed enriched cages with access to barley silage reduces aggressive and feather-pecking behaviour
10.1139/cjas-2015-0133 · ExternalCitation · doi-reference
Causes of mortality in laying hens in different housing systems in 2001 to 2004
10.1186/1751-0147-51-3 · ExternalCitation · doi-reference
A cross-sectional study on feather cover damage in Canadian laying hens in non-cage housing systems
10.1186/s12917-019-2168-2 · ExternalCitation · doi-reference
The European Union ban on conventional cages for laying hens: History and prospects
10.1207/s15327604jaws0602_03 · ExternalCitation · doi-reference
Synergistic effect of progesterone, testosterone, and estradiol in the stimulation of chick renal 25- hydroxyvitamin D3-lα-hydroxylase
10.1210/endo-103-6-2035 · ExternalCitation · doi-reference
Medullary bone and avian calcium regulation
10.1242/jeb.184.1.63 · ExternalCitation · doi-reference
Do laying hens with keel bone fractures experience pain?
10.1371/journal.pone.0042420 · ExternalCitation · doi-reference
Development of an ex vivo protocol to model bone fracture in laying hens resulting from collisions
10.1371/journal.pone.0066215 · ExternalCitation · doi-reference
Soft perches in an aviary system reduce incidence of keel bone damage in laying hens
10.1371/journal.pone.0122568 · ExternalCitation · doi-reference
Implications for welfare, productivity and sustainability of the variation in reported levels of mortality for laying hen flocks kept in different housing systems: A meta-analysis of ten studies
10.1371/journal.pone.0146394 · ExternalCitation · doi-reference
Pathological characterization of keel bone fractures in laying hens does not support external trauma as the underlying cause
10.1371/journal.pone.0229735 · ExternalCitation · doi-reference
Incidence, severity, and welfare implications of lesions observed postmortem in laying hens from commercial noncage farms in California and Iowa
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