Excuse me for being dumb but the line of thinking that a wonderful animal should be killed instead of raised in a zoo, just zooms right over my head!!!!

So should everyone who has a pet cat or dog let them go in the wild because they all used to be wild animals before their breeds were tamed?
Now, I know no one is going to keep a polar bear in their home but still that baby sure doesn't seem to be suffering to me. Ending a life (even an animal one) is not something to be done lightly.

What next? Killing human orphans?