?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=How+to+motivate+laying+hens+to+use+the+hen+run%3F&rft.creator=Zeltner%2C+Esther&rft.creator=Hirt%2C+Helen&rft.creator=Hauser%2C+J.&rft.subject=+Poultry&rft.subject=+Health+and+welfare&rft.description=In+organic+agriculture%2C+hens+are+kept+in+free+range+systems.+A+free+range+is+an+enrichment+for+the+hens+and+brings+several+advantages+for+them.+Laying+hens+may+show+behavioural+elements+that+are+not+possible+in+a+poultry+house.+For+instance%2C+sunbathing+behaviour+is+only+shown+in+direct+sunlight+and+not+in+artificial+light+(Huber%2C+1987).+Hens+spend+35.3-47.5%25+of+their+time+with+food+searching+(F%C3%83%C2%B6lsch+and+Vestergaard%2C+1981)+and%2C+in+natural+habitats%2C+invertebrate+food+appears+to+be+an+importnat+addition+to+the+diet+(Savory+et+al.+1978).+Free+range+systems+may+also+have+an+influence+on+animal+health+and+product+quality.+Lopez-Bote+et+al.+(1998)+suggested+that+some+constituents+of+grass+might+be+of+interest+for+the+production+of+eggs+rich+in+(n-3)+fatty+acids.%0D%0AIn+flocks+of+free+range+hens%2C+generally+only+a+small+proportion+of+the+flock+is+outside+at+any+one+time%2C+and+most+hens+stay+near+the+poultry+house.+In+an+account+of+the+uneven+distribution+of+the+hens+in+the+free+range+area%2C+Menzi+et+al.+(1997)+found+a+nutrient+and+heavy+metal+overload+on+the+frequently+used+parts+of+the+run.+For+a+better+distribution%2C+they%2C+as+well+as+several+label+programmes%2C+recommend+to+structure+the+outdoor+area+with+trees+and+installations+providing+shade+and+protection+for+the+hens.%0D%0AWe+attempted+to+determine+management+and+structural+factors+that+would+result+in+more+hens+in+the+run+and+a+more+even+distribution+of+the+animals+in+several+experiments%2C+with+a+special+emphasis+on+the+idea+that+the+hen+run+should+be+easily+manageable+for+the+farmer.&rft.publisher=SAFO+Sustaining+Animal+Health+and+Food+Safety+in+Organic+Farming.+A+European+Commission+funded+Concerted+Action+Project.+University+of+Reading&rft.contributor=Hovi%2C+Malla&rft.contributor=Sundrum%2C+Albert&rft.contributor=Padel%2C+Susanne&rft.date=2004&rft.type=Book+chapter&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F3159%2F1%2Fzeltner-et-al-2004-how-to-motivate-laying-hens.pdf&rft.identifier=Zeltner%2C+Esther%3B+Hirt%2C+Helen+and+Hauser%2C+J.+(2004)+How+to+motivate+laying+hens+to+use+the+hen+run%3F+In%3A+Hovi%2C+Malla%3B+Sundrum%2C+Albert+and+Padel%2C+Susanne+(Eds.)+Organic+livestock+farming%3A+potential+and+limitations+of+husbandry+practice+to+secure+animal+health+and+welfare+and+food+quality.+Proceedings+of+the+2nd+SAFO+Workshop+25-27+March+2004%2C+Witzenhausen%2C+Germany%2C+SAFO+Sustaining+Animal+Health+and+Food+Safety+in+Organic+Farming.+A+European+Commission+funded+Concerted+Action+Project.+University+of+Reading%2C+pp.+161-165.&rft.relation=http%3A%2F%2Forgprints.org%2F3159%2F