?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=A+note+on+fear+reaction+of+three+different+genetic+strains+of+laying+hens+to+a+simulated+hawk+attack+in+the+hen+run+of+a+free-range+system&rft.creator=Zeltner%2C+Esther&rft.creator=Hirt%2C+Helen&rft.subject=+Poultry&rft.subject=+Breeding+and+genetics&rft.description=Hens+well+adapted+to+free-range+systems+should+react+quickly+to+avoid+an+attack+by+a+predator+but+should+also+be+able+to+return+to+the+hen+run+soon+after+to+ensure+good+use+of+the+outside+area.&rft.publisher=Elsevier+B.V.&rft.date=2008&rft.type=Journal+paper&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F14778%2F1%2Fzeltner-hirt-2008-APPLAN2898.pdf&rft.identifier=Zeltner%2C+Esther+and+Hirt%2C+Helen+(2008)+A+note+on+fear+reaction+of+three+different+genetic+strains+of+laying+hens+to+a+simulated+hawk+attack+in+the+hen+run+of+a+free-range+system.+Applied+Animal+Behaviour+Science%2C+Issues+1-3+(113)%2C+pp.+69-73.&rft.relation=http%3A%2F%2Forgprints.org%2F14778%2F