I'd cut back on the feed. Chickens always act like they're starving to death but do not need to be fed 24/7. My flock gets rationed feedings and are quite healthy, beautiful birds.
Some may not agree with this, but it's what I do to limit waste.
I'd definitely do as others have suggested and look into something else eating up your feed as well.
I'd definitely do as others have suggested and look into something else eating up your feed as well.