Development of minimum requirements for the rearing of laying hens regarding minimisation of feather and vent pecking during the laying period of hens kept in free-range and barn systems based on an epidemiological study

Although many factors, that promote the development and the occurrence of feather and vent pecking are well known, these behavioural disturbances are still major problems in alternative systems for laying hens. To verify the influence of the rearing conditions on the occurrence of feather and vent pecking during the laying period data have been collected and plumage and skin condition of hens has been scored on 50 rearing units and two subsequent laying hen units in Germany and Austria. Aim of the project is to compile a catalogue stating minimum requirements for the rearing of laying hens that lead to a considerable minimisation of feather and vent pecking during the laying period. The requirements will be ranked regarding their significance and they will be assessed regarding possibility of realisation and economy. The requirements shall be valid as recommendations for farmers and for the further development of the Tierschutz-Nutztierhaltungsverordnung. The compilation of the catalogue will be based on an epidemiological study of on-farm conditions at rearing units with regard to risk factors for feather and vent pecking as well as on a literature study and on expert-opinion.

Responsible: Marion Staack, Ute Knierim

In cooperation with: Christiane Keppler, Maja Günther

Bettina Gruber, Katrina Zaludik, Knut Niebuhr, Institute of Animal Husbandry and Animal Welfare, University of Veterinary Medicine, Vienna

Duration: 2004 – 2007

Funding: Ministry of food, agriculture and consumer protection (BMELV) by the agency of the Federal Institution of agriculture and food (BLE).