Heard of Marius the Danish giraffe? Worldwide outrage greeted the news that despite protests, this long-legged inhabitant of Copenhagen Zoo had been killed and fed to the lions. Euthanasia isn't uncommon among zoos but Marius' death and dissection were a PR disaster for the zoo. And no wonder. Modern revulsion over killing exotic animals is well established. We're conscious of our destructive impact on ecosystems and feel intensely squeamish when reminded of how we've driven