Abstract

Simple SummaryAn important challenge for the further development of organic egg production is to reach and maintain a high level of animal welfare. In a European research project including eight countries, the welfare state in 107 laying hen flocks as well as their housing and management were recorded during two farm visits at peak and end of lay. Data analysis aimed to reveal factors that may help to prevent or reduce welfare problems. Large variation between flocks indicated options for improvement with regard to mortality, feather and injurious pecking, parasitic infestation and keel bone damage. Results of the project indicate that (i) decreasing mite and worm infestation and (ii) providing an attractive covered veranda help to decrease mortality; (iii) maximising access to the free-range to decrease injurious pecking and Ascaridia galli infection; (iv) feeding sufficient protein levels and (v) providing adequate litter is preventive against feather pecking and cannibalism; (vi) ensuring that the birds have sufficient weight and (vii) preventing accidents by adequate hen house facilities and light conditions contributes to reduced keel bone damage. These primarily management-based measures have the potential to improve bird welfare both in terms of behavioural and health aspects in organic egg production systems.In the European research project HealthyHens, welfare indicators as well as husbandry and management conditions were recorded in 107 organic laying hen farms in eight countries. Farms were visited at peak and end of lay. Egg production was on average comparable to breeder specifications. A mean mortality of 5.7% and mean prevalences of footpad lesions of 30.5%, keel bone damage of 44.5%, 57.3% of flocks with on average >200 Ascarid eggs per gram faeces and 28.2% of flocks with >100 mites/trap were recorded. A large variation between flocks indicated options for improvement. Based on the results, the following measures can be recommended: (i) decreasing mite and worm infestation and (ii) providing an attractive covered veranda, because of their association with decreased mortality; (iii) maximising access to the free range, because of its relation to decreased A. galli infection and less injurious pecking; (iv) feeding sufficient protein levels and (v) providing adequate litter as preventive measure against feather pecking and cannibalism; (vi) ensuring that the birds have sufficient weight and (vii) preventing accidents by adequate hen house facilities and light conditions to reduce keel bone damage. These primarily management-based measures have the potential to improve bird welfare both in terms of behavioural and health aspects.

Keywords

animal welfare; laying hen health; feather pecking; keel bone damage; laying hen; parasite load; free-range use

Published in

Animals
2020, Volume: 10, number: 11, article number: 2102
Publisher: MDPI

SLU Authors

• Gunnarsson, Stefan

  • Department of Applied Animal Science and Welfare, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Animal and Dairy Science


Publication identifier

DOI: https://doi.org/10.3390/ani10112102

Permanent link to this page (URI)

https://res.slu.se/id/publ/109493