Yep, it's normal for them to be cranky during molt, to humans and to each other. It's both an itchy and a vulnerable time for them. I'd not worry too much about what they eat right now...just offer the FF and let them range. They'll eat what they need and leave the rest. Then you can feed less the next day until they are cleaning up everything you've fed. They won't starve themselves and they are tucking in good nutrients right now as they go into winter so they often know best about what they are needing.
