I think I will give the Kalmbach a try.
I have never thought to look for a mill date on feed bags, but I will now!! Where do you typically find it on the bag?
Here's a picture of where Kalmbach puts the mill date.Usually on the bottom bag seal or the nutrition tag.
The "22269" is the mill date. It means the 269th day of '22.
Add water to crumble, you have mash and the rodents can't steal it.
so learn the level of protein & calcium you love by reading the label..