I see this going the route of all the QDM debates.If it is an animal you would be pleased with if you were to kill it,then kill it.
I am not a big fan of the"if I don't someone else will logic"maybe someone else will maybe they wont,if you kill it somebody did.If that is to be your only reason for taking it then I would think that is a mistake!If it makes you pleased and/or proud kill it,if it doesn't let it walk.