I have a small farm supply in my area that makes their own feed and stocks a huge variety of brands. Their house feed is cheaper than TSC and my girls love it.
I only found out about it because I picked up a bunch of pallets to build a coop off of a guy who also raised chickens and we got to talking.
Rural general stores may as well.
I actually just googled “farm stores near me” and found 2 others that are still closed than either of my TSCs.