Kalmbach has good customer service, I would contact them.
We’re feeding Kalmbach 20% flock maker crumbles, and it’s the same date as yours. The cardinals and sparrows are so bad about stealing feed and making a mess that I now give them their own bowl of feed outside the run. The chickens...
Have you offered any other feeds? Your chickens could have some other issue than the feed. I feed Kalmbach and my chickens really love it. They prefer it to the Purina I recently changed from. The Kalmbach feed smells good==does yours have an off smell?
Just look at the 3 digit day and estimate—roughly 30 days per month. But I do keep a Julian chart where I mark when I start new bags. So if I needed feed today, I’d look for as close to 80 (080) as possible. And sometimes our store rotates their stock, and sometimes they don’t.
Aug 25 this year on a feed bag will say 23 237 Aug 25 is the 237th day. The 2 digit year comes first.
And Kalmbach does use Julian date, as does Purina.