How are they really doing? Animal welfare on organic laying hen farms in terms of health and behaviour
Creators: name: Göransson, Lina
name: Abeyesinghe, Siobhan
name: Yngvesson, Jenny
name: Gunnarsson, Stefan
Publisher: name: Taylor & Francis
Year: 2023
Subjects: subject: Space Science
subject: Biotechnology
subject: Ecology
subject: FOS: Biological sciences
subject: Sociology
subject: FOS: Sociology
subject: Immunology
subject: FOS: Clinical medicine
subject: Science Policy
subject: Mental Health

description: The purpose of the present study describes the current welfare situation on a commercial organic laying hen farms in Sweden in terms of indoor environment, bird health and behaviour.Organic laying hen farms (n=11) in Sweden were visited for one day each. The farm visits were performed at end of lay, and involved farmer interviews, indoor environment assessments, behavioural observations and tests and clinical examinations in one flock per farm.In 95% of all human avoidance distance test trials performed, the hens distanced themselves from the observer before the test was completed. Median number of birds per flock approaching during a novel object test (n=4 trials per flock) was 2 (0-9). These results indicated a high level of fear of humans and general fearfulness among the hens.Plumage damage was especially prevalent and most severe on the breast and belly, tail and wings, with median prevalence of moderate-severe damage of 96% (84-100), 96% (72-100) and 98% (94-100), respectively. Median prevalence of keel bone deviations was 67% (32-84) with 3% fractures (0-8). Median prevalence of breast skin lesions was 57% (10-74). There was a significant positive association between breast skin lesions and keel bone deviations (P=0.02) and foot pad hyperkeratosis (P&lt;0.001). Median prevalence of severe hyperkeratosis was 33% (8-96), with prevalence being significantly lower where litter depth was thicker (P=0.003). More dust bathing events were observed in flocks where litter depth was thicker (P=0.007).The present study contributes with updated knowledge of laying hen welfare on organic farms in Sweden. The results confirmed previous on-farm studies, demonstrating that important issues, including keel bone damage and severe feather pecking, remain in need of attention to ensure the welfare of laying hens in future commercial egg production. The purpose of the present study describes the current welfare situation on a commercial organic laying hen farms in Sweden in terms of indoor environment, bird health and behaviour. Organic laying hen farms (n=11) in Sweden were visited for one day each. The farm visits were performed at end of lay, and involved farmer interviews, indoor environment assessments, behavioural observations and tests and clinical examinations in one flock per farm. In 95% of all human avoidance distance test trials performed, the hens distanced themselves from the observer before the test was completed. Median number of birds per flock approaching during a novel object test (n=4 trials per flock) was 2 (0-9). These results indicated a high level of fear of humans and general fearfulness among the hens. Plumage damage was especially prevalent and most severe on the breast and belly, tail and wings, with median prevalence of moderate-severe damage of 96% (84-100), 96% (72-100) and 98% (94-100), respectively. Median prevalence of keel bone deviations was 67% (32-84) with 3% fractures (0-8). Median prevalence of breast skin lesions was 57% (10-74). There was a significant positive association between breast skin lesions and keel bone deviations (P=0.02) and foot pad hyperkeratosis (P&lt;0.001). Median prevalence of severe hyperkeratosis was 33% (8-96), with prevalence being significantly lower where litter depth was thicker (P=0.003). More dust bathing events were observed in flocks where litter depth was thicker (P=0.007). The present study contributes with updated knowledge of laying hen welfare on organic farms in Sweden. The results confirmed previous on-farm studies, demonstrating that important issues, including keel bone damage and severe feather pecking, remain in need of attention to ensure the welfare of laying hens in future commercial egg production.