exactly glyn, that is the big opposition, if you get a high profile animal, like gorrilla, rhino or ele, ya doing wrong, but if u do it to sheep cattle, even kangaroos for a captive situation, then u are not facing objection.
people have a relationship to mammals, we are all warm blooded, and the public associate with mammals more so than any other genre. thats why its ok to see in zoos live insects being fed to beardies, but never live mice to fennec foxes.