I'm not sure whether this goes here or in Event Issues, but even though my battler pet is at 10/10 hunger, 10/10 happiness, and full health, the Battle Coliseum isn't letting me select an opponent--it gives me the "Oh no! None of your pets are eligible for battle. You might want to make sure that they're well fed and happy!" message. I'm using Chrome on a MacBook Pro, if it matters.

The cache sometimes takes a bit to catch up. If it isn't already fixed or you run into this again, try hard refreshing a few times (Cmd-Shift-R on a mac I believe). Going back to the main challenge page can help too if you're on an opponent's page.

I was already in a battle, I always forget about that after group battles end. Thanks !