▁Robert ▁Be an ▁to ▁spare ▁Z ig gy ' s ▁life . ▁Be an ▁decided ▁that ▁the ▁animal ▁would ▁not ▁be ▁killed , ▁but ▁would ▁be ▁kept ▁inside ▁the ▁P ach y der m ▁House ▁at ▁all ▁times ▁as ▁a ▁safety ▁pre ca ution . ▁Later ▁that ▁day , ▁Lewis ▁returned ▁to ▁Z ig gy ' s ▁yard ▁and , ▁with ▁the ▁help ▁of ▁another ▁ele ph ant , ▁led ▁the ▁animal ▁ind o ors . ▁For ▁the ▁next ▁few ▁dec ades , ▁the ▁animal ▁would ▁remain ▁alone ▁in ▁a ▁st all , ▁attached ▁to ▁a ▁wall ▁with ▁a ▁chain ▁of ▁variable ▁length . ▁ ▁Years ▁later , ▁Lewis ▁explained ▁that ▁Z ig gy ▁was ▁in ▁the ▁midst ▁of ▁his ▁must h ▁period ▁on ▁the ▁day ▁of ▁the ▁attack . ▁Must h ▁is ▁a ▁time ▁of ▁high ▁test oster one ▁levels ▁in ▁male ▁ele ph ants , ▁leading ▁to ▁ag gress ive ▁behavior , ▁and ▁Z ig gy ▁may ▁have ▁been ▁ag itated ▁because ▁keep ers ▁had ▁been ▁ur ging ▁him ▁to ▁mate ▁with ▁a ▁female ▁ele ph ant . ▁ ▁Camp aign ▁to ▁free ▁Z ig gy ▁In ▁March ▁ 1 9 6 9 , ▁Michael ▁S need ▁of ▁the ▁Chicago ▁Trib une ▁called ▁attention ▁to ▁Z ig gy ' s ▁conf in ement , ▁writing , ▁" Z ig gy ' s ▁six - foot ▁t us ks , ▁which ▁once ▁grew ▁so ▁long ▁they ▁crossed ▁each ▁other , ▁now ▁are ▁decay ed ▁and ▁broken . ▁The ▁once ▁frequent ▁maj estic