Some all flock such as Purina flock raiser crumbles includes chicks when the say all flock. I have not done any research, but I have been giving my chicks all flock. The ducklings definitely benefit from it, and the chicks seem to do well. My birds also free range.
Many people feed their hens a layer feed which includes more calcium than starter. The extra calcium has been found to build up over time and can cause internal damage. (Many people have fed layer to their chicks all along without signs of problems.)
Many people feed their hens a layer feed which includes more calcium than starter. The extra calcium has been found to build up over time and can cause internal damage. (Many people have fed layer to their chicks all along without signs of problems.)