Hello. I have two age groups of chickens, the older six (two Barred Rocks, two Wyandottes, one buff Orpington and one Cochin) are coming up on 16 weeks. One feed store told me that feeding them pullet starter until they lay their first eggs can cause internal damage from too much protein, while another recommended feeding them starter all the way up to them laying their first eggs. Could someone please clear up this difference of opinion. I certainly don't want to harm my ladies. The other six (all Ameraucanas) are 13 weeks old, so I'm assuming I'll need to separate their feed. Thank you for any information!