My wife and I got 14 chicks back in mid to late March. All within one week of each other as far as age. They are a mix of breeds. We went out today and one hen has started laying. We still have them on Purina starter/grower and planned on that for the next 2-4 weeks. Should we switch them all to the laying feed now? This is our first time trying to raise chickens so we aren't sure what to do and our local place wasn't much help when we asked. Thanks for any info.