▁meat ▁and ▁eggs ▁in ▁their ▁en demic ▁range . ▁The ▁und om estic ated ▁form ▁is ▁sometimes ▁used ▁in ▁co ck - f ight ing . ▁ ▁Tim eline ▁of ▁domestic ation ▁ ▁In ▁ 2 0 1 2 , ▁a ▁study ▁exam ined ▁mit och ond rial ▁DNA ▁recovered ▁from ▁ancient ▁b ones ▁from ▁Europe , ▁Th ailand , ▁the ▁Pacific , ▁and ▁Chile , ▁and ▁from ▁Spanish ▁colonial ▁sites ▁in ▁Florida ▁and ▁the ▁Domin ican ▁Republic , ▁in ▁directly ▁dated ▁samples ▁origin ating ▁in ▁Europe ▁at ▁ 1 , 0 0 0 ▁B P ▁and ▁in ▁the ▁Pacific ▁at ▁ 3 , 0 0 0 ▁B P . ▁Ch icken ▁was ▁primarily ▁domestic ated ▁from ▁red ▁j ung lef ow l , ▁with ▁subsequent ▁gen etic ▁contributions ▁from ▁grey ▁j ung lef ow l , ▁Sri ▁L ank an ▁j ung lef ow l , ▁and ▁green ▁j ung lef ow l . ▁Dom estic ation ▁occurred ▁about ▁ 8 , 0 0 0 ▁years ▁ago , ▁as ▁based ▁on ▁mole cular ▁evidence ▁from ▁a ▁common ▁ancest or ▁f lock ▁in ▁the ▁bird ' s ▁natural ▁range , ▁and ▁then ▁proceeded ▁in ▁waves ▁both ▁east ▁and ▁west . ▁Other ▁arch ae ology ▁evidence ▁suggest ▁domestic ation ▁date ▁around ▁ 7 , 4 0 0 ▁B P ▁from ▁the ▁Ch ish an ▁site , ▁in ▁the ▁Heb ei ▁province ▁of ▁China . ▁However , ▁domestic ation ▁event ▁in ▁China ▁has ▁now ▁been ▁disput ed ▁by ▁several ▁studies ▁cit ing ▁unf av ou