Mine are on layer now at 17 weeks for their primary food. I wanted to get them off the medicated starter / grower a few weeks before they are supposedly going to start laying. Kind of a hard age since they might start laying tomorrow or not till August.. Almost bought a bag of the flock raiser, I'm sure that would have been fine too, I don't really have enough chickens to justify a 50lb interim bag or I would have gone that route. I'd say maybe 60% of their daily intake is the layer feed, the rest is what they get in the yard, still have some lawn left in their run + a few treats. Saw the biggest slug today of my life, that went into the run almost immediately
Mark

Mark