?? I have the item in my inventory, so yes I do have what it wants.

Can someone please explain to me why this happens?

It's most likely that the minion has already been feed.

actually, what's probably happening is that the minions have been cleared and new ones have appeared that want different things. if it was already fed, it would say it was already fed.

Yes what glory said. Just refresh the page and see if they've changed. They change them very frequently. You have to be fast.

Oh, thank you so much for the replies! :D Finally, I'm able to feed the minions.