Species: Laying hens

Keel bone damage and access to functional resources and housing areas in laying hens: a systematic thematic review

Stefanie Petow, Helen Louton, Serge Alindekon

Published in 2026

A study showing that sternum injuries in laying hens are associated with a lower frequency of access to perches and elevated resources, without necessarily reducing the duration of their use.

Document Types: Scientific review

Animal categories: Poultry

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Multi-Behavior Recognition and Health Assessment of Laying Hens Using RSA YOLO in Welfare-Oriented Farming

Panqi Pu, Junge Wang, Yue Gao, Dapeng Li, Geqi Yan, Hongchao Jiao, Xianyao Li, Hai Lin

Published in 2026

Study on an automated system based on artificial intelligence that can recognize various behaviors in laying hens and assess their health status. The behavioral changes it detected occurred approximately one week before a decline in egg production, demonstrating the system’s potential as an early-warning tool.

Document Types: Scientific paper

Animal categories: Poultry

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Financing the Transition to Cage-Free Farming in the EU

Godfroy, A., Muro, M., Nadeu, E., Wedl, I., Jadzisnka, J.

Published in 2026

Report providing a comprehensive and up-to-date assessment of the financing options for the transition to cage-free livestock farming systems at EU level, drawing on scientific data, an analysis of European policies, national case studies, and interviews with industry experts.

Document Types: Technical review

Animal categories:Cattle, Pigs, Poultry

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Bored birds? Researchers are exploring boredom as a potential welfare concern in poultry

Chloe Phelps, Virginia Tech, Leonie Jacobs

Published in 2026

An article describing boredom in poultry. Linked to a lack of stimulation, it could pose a welfare issue for poultry raised in poorly enriched environments.

Document Types: Scientific paper

Animal categories: Poultry

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Bien-être et comportement des poules domestiques

Cécile Arnould

Published in 2026

Book detailing the sensory, social, emotional, and cognitive abilities of domestic chickens in order to improve recognition of their sensitivities and the importance of their welfare, drawing on scientific advances, changes in legislation, and the author's experience.

Document Types: Scientific work

Animal categories: Poultry

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Fowl play: Do age and aviary design affect play in cage-free laying hens?

Xiaowen Ma, Vrinda Ambike, Valentina Bongiorno, Jacquelyn A. Jacobs, Janice C. Swanson, Tina M. Widowski, Janice M. Siegford

Published in 2026

Study showing that the play behavior of laying hens decreases significantly with age, and is influenced by aviary design and space allocation per bird. Certain activities, such as more frequent running or wing flapping, were influenced by aviary design and space per bird. The study concludes that housing configuration influences welfare and may interact with the hens' developmental stage.

Document types: Scientific documents

Animal categories: Poultry

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Advancements in machine learning applications in poultry farming: a literature review

Naeem M, Jia Z, Wang J, Poudel S, Manjankattil S, Adhikari Y, Bailey M, Bourassa D

Published in 2025

Review highlighting the potential of machine learning to optimize poultry production, improve animal welfare and detect disease at an early stage using sophisticated predictive and monitoring tools. It does, however, highlight the challenges surrounding the quality and interpretation of data and models, and their use on the ground. 

Document Types: Scientific review

Animal categories: Poultry

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The right fit: A decision tree to select a protocol for assessing the welfare of laying hens

Muhammad Fathin Hanif, Liesbeth G.W. Van Damme, Charlotte Vanden Hole, T. Bas Rodenburg, Vera Bavinck, Xavier Averós, Inma Estevez, Ali Agus, Frank A.M. Tuyttens

Published in 2025

Development of a decision tree to help members of the laying-hen industry to select the welfare assessment protocols that are best suited to their needs.

Document types: Technical Paper

Animal categories: Poultry

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Systematic Review of Acoustic Monitoring in Livestock Farming: Vocalization Patterns and Sound Source Analysis

Ramos Niño JN, Sousa FCd, Oliveira CEA, Coelho ALdF, Hernandez RO, Barbari M.

Published in 2025

Systematic review showing that environmental sounds and animal vocalizations have promise as non-invasive indicators of animal welfare. Despite technological advances, challenges remain in terms of standardization, physiological validation and practical application under real-life commercial conditions.

Document Types: Scientific review

Animal categories:Cattle, Pigs, Poultry

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Productive and welfare parameters in trimmed laying hens: A systematic review-meta-analysis

Henrique Sonda Gallina, Maria Eugênia Andrighetto Canozzi, Pietra Viertel Molinari, Juahil Martins de Oliveira Júnior, Ivan Bianchi, Fabiana Moreira, Débora Cristina Olsson, Paula Gabriela da Silva Pires, Javier Sanchez, Vanessa Peripolli

Published in 2025

Meta-analysis comparing the effects on laying hens of beak trimming with a hot blade or  infrared radiation. The infrared method would appear to be a less invasive option, but further studies are needed to confirm this finding.

Document Types: Scientific review

Animal categories: Poultry

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