When I got my six chicks at a day old, the feed store talked me into purchasing a 50 lb bag of organic chick starter. They told me that it was ok to use the bag until it was gone. At about 14 weeks, I finally got low on feed and went back to the store. They then told me that I should have switched my birds to grower feed at 8 weeks. The gentleman at the feed store said that they needed to be on grower feed for at least 10 weeks and that this might delay laying. I bought organic grower feed so it isn't medicated. They are also getting oyster shell and grit, plus they are excellent foragers so I feel like they aren't constantly at the feeder. They're almost 19 weeks old now and they're starting to squat. Will I need to switch to layer feed to get them to lay? If so, is it really important for them to have the grower feed for 10 weeks, or was the guy just trying to sell me another 50lb bag?