Billing out can create an insane amount of wasted feed.so I've gone through 3 feeders until I found one that's truly no-waste.
Maybe freeze half a 50# bag?(and wasted feed will add up and be a non-trivial amount with 50 lbs bags and only 5 chickens). My best bet would be to split bags (and cost) with somebody else.
Should keep it 'fresher'.
Would need to be absolutely air tight packages.
Maybe in multiple ziplock bags.