My minion zoo just stays on loading over and over...it doesn't ever actually open. I'm using Google Chrome.

nope :(

while this may not fix your issue, it might let you get around it. Try going to this URL: /Kitaki">https://subeta.net/games/minions//Kitaki It will let you look at what is in your zoo. If you want to remove one, you can do an account search on the minion name and remove it from that view