e ▁or ▁tail , ▁or ▁he ▁may ▁his s ▁and ▁hit ▁them ▁with ▁his ▁p aws . ▁Dom estic ▁male ▁c ats ▁also ▁have ▁variable ▁att itudes ▁towards ▁their ▁family ▁members , ▁for ▁example , ▁older ▁male ▁sib lings ▁tend ▁not ▁to ▁go ▁near ▁younger ▁or ▁new ▁sib lings ▁and ▁may ▁even ▁show ▁host ility ▁toward ▁them . ▁ ▁H iss ing ▁is ▁also ▁a ▁vocal ization ▁associated ▁with ▁either ▁off ensive ▁or ▁def ensive ▁ag gression . ▁They ▁are ▁usually ▁accompanied ▁by ▁a ▁post ural ▁display ▁intended ▁to ▁have ▁a ▁visual ▁effect ▁on ▁the ▁perce ived ▁threat . ▁C ats ▁his s ▁when ▁they ▁are ▁start led , ▁sc ared , ▁angry , ▁or ▁in ▁pain , ▁and ▁also ▁to ▁sc are ▁off ▁intr ud ers ▁into ▁their ▁territory . ▁If ▁the ▁his s ▁and ▁grow l ▁warning ▁does ▁not ▁remove ▁the ▁threat , ▁an ▁attack ▁by ▁the ▁cat ▁may ▁follow . ▁K itt ens ▁as ▁young ▁as ▁two ▁to ▁three ▁weeks ▁will ▁potentially ▁his s ▁when ▁first ▁picked ▁up ▁by ▁a ▁human . ▁ ▁H oney be es ▁ ▁H oney be es ▁(" A pis ▁m ell if era ▁car nica ") ▁were ▁trained ▁to ▁extend ▁their ▁prob os cis ▁to ▁a ▁two - component ▁od our ▁mixture ▁( CS +) ▁predict ing ▁a ▁reward ▁( e . g ., ▁ 1 . 0 0 ▁or ▁ 2 . 0 0 ▁M ▁suc rose ) ▁and ▁to ▁with hold ▁their ▁prob os cis ▁from ▁another ▁mixture ▁( CS − )