Did I miss something? I don't remember seeing anything about this. I was looking at the new extremely creepy rabbit minion from Elwood and noticed there was a 'send to minion zoo' option. What does that do? I don't want to do it and then find out I've done something stupid.

It's part of a new minion battling feature, currently in beta testing for GA users. You can read about it here (as long as you have a GA). You can remove minions later if you want.

Mmm, interesting! Thanks. :)