Taylor Swift and Travis Kelce's Sydney Zoo date was cute and all ... but PETA says they should've been mindful of how the animals are treated/handled in this type of environment.
Debbie Metzler -- PETA Foundation Director of Captive Animal Welfare -- uses Taylor's own song against her to make her point ... telling TMZ, "While we understand all too well the appeal of seeing Australia's wildlife, PETA hopes that next time Taylor and Travis want to see wild animals, they'll spend their time and money at a true sanctuary.