Jack Hanna, who is like the most famous TV-Wildlife dude ever, basically said they had no choice besidesshoot to kill for most of the animals. According to him, a tranq dose could take 3-10 minutes to take effect, and in the meantime you have a REALLY pissed off and scared Bengal tiger. Oh wait. You have 18.

It's really, really horrible especially since some of the animals are such threatened species. The best thing that will come from this is the state of Ohio at the very least will enact some much tougher laws on owning exotic animals (as in making it ttly illegal.)