I think they should release it back into the wild if possible. Although this may not be an option since orcas tend to live in pods, right? And this one wouldn't have a pod. I'm no expert on their behavior. I just think it sucks to take/raise an animal in captivity, and then destroy it. Just because it does what it is designed to do, and then it backfires on us humans, it deserves to die.
It bites big time. Whales in captivity aren't really happy and doing stupid tricks for the public probably is a poor substitute for living a free life with the family you were snatched from. However, if this whale (as described) hurts people the few alternatives left would be trying to rehabilitate it so it can be released into the wild*, or put down.
Additionally, the $$$ amount paid out for this whale, display income + stud fees/services had Anheuser Busch keeping this whale around.
* Keiko experiment did not work out as expected...well intentioned as it was.
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