?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=Investigation+into+the+effect+of+%C3%A2%C2%80%C2%9Cday+one+weight%C3%A2%C2%80%C2%9D+on+bird+weight+gain+of+ISA+257+table+birds+within+the+Sheepdrove+Organic+Farm+organic+silvo-poultry+system&rft.creator=O'Brien%2C+Josie&rft.subject=+Feeding+and+growth&rft.description=This+report+summarises+the+results+of+a+preliminary+trial+undertaken+to+investigate+the+effect+of+day+one+chick+weight+on+weight+gain+and+final+weight.+%0D%0AThe+objectives+of+the+trial+were+to+ascertain+the+range+in+weights+of+day+old+chicks+brought+on+to+the+farm+and+establish+if+any+low+or+high+weights+were+impacting+on+the+weight+gain+and+final+weight+of+the+birds.+%0D%0AA+sub-sample+of+the+brooder+intake+of+birds+was+weighed+on+arrival+and+marked+in+accordance+with+their+weight.+Marked+birds+were+caught+and+re-marked+weekly.%0D%0AAt+week+four%2C+prior+to+the+move+of+the+birds+to+the+field+sheds%2C+the+marked+birds+were+caught+weighed+and+re-marked.+It+was+at+this+point+that+the+trial+was+abandoned+as%2C+of+the+150+birds+marked+at+the+start+of+the+trial+period%2C+only+48+birds+were+recovered+for+re-weighing%2C+despite+weekly+re-marking.%0D%0ADespite+this%2C+preliminary+findings+suggest+that+birds+with+low+weight+(below+target+weight)+fail+to+perform+and+gain+weight+as+well+as+birds+that+were+heavier+on+day+one.%0D%0AHowever%2C+as+discussed%2C+these+findings+are+based+on+a+limited+data+set+so+further+investigation+needs+to+be+undertaken+to+confirm+this+finding.+Future+trials+should+also+investigate+whether+this+trend+of+lower+weight+gain+for+birds+that+start+at+a+lighter+weight+carries+through+to+end+weight.&rft.date=2004-11&rft.type=Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.identifier=http%3A%2F%2Forgprints.org%2F10298%2F1%2FWeight_Bird_Report.pdf&rft.identifier=O'Brien%2C+Josie+(2004)+Investigation+into+the+effect+of+%C3%A2%C2%80%C2%9Cday+one+weight%C3%A2%C2%80%C2%9D+on+bird+weight+gain+of+ISA+257+table+birds+within+the+Sheepdrove+Organic+Farm+organic+silvo-poultry+system.+[+Unpublished%2C+]&rft.relation=http%3A%2F%2Forgprints.org%2F10298%2F