Shoot. I just ordered a bag of layer feed for the new pullets I am getting today. But I also have straight run young chicks that will be integrating with them, so there will be roosters too. Does that mean I can't feed the layer? Or I would have to keep everything separated? Maybe save the layer food until they are all grown, but then what about the roosters?
layer feed (excess calcium that they don’t pick out) will damage the kidneys of chickens that aren’t laying eggs. If it’s one bag just feed it but you won’t be able to keep the chicks outof the hens feed so you’ll want to be switching to a starter, grower, or all flock feed at some point before the chicks / Roos get into the hens feed.
it is far better for a hen to pick oyster shell from a separate container than to feed calcium to a mixed flock. Or so the internet says and I tend to go with it.