Nutrena makes Flock Raiser. There are other brands of flock raiser or all purpose flock feed. The protein content is 20% Yes, I've substituted chick starter when the feed store is all out of flock raiser.
Long term consumption of calcium when their bodies have low or no demand for it can be harmful, and they need the protein more than they need the calcium. It's just one of those things chicken owners automatically do when they would be better off making informed decisions. Just because you have laying hens doesn't mean you automatically should feed them layer feed.
It's always a good thing to question why we do the things we do.
Long term consumption of calcium when their bodies have low or no demand for it can be harmful, and they need the protein more than they need the calcium. It's just one of those things chicken owners automatically do when they would be better off making informed decisions. Just because you have laying hens doesn't mean you automatically should feed them layer feed.
It's always a good thing to question why we do the things we do.