Hi, This is kind of a thread of a thread, related to steffpeck's question about one kind of feed for all chickens... My birds just turned 16 weeks. I have 13 pullets and two roos. I've gotten one egg yesterday and one the day before, so someone is laying. I need more chicken food - do I get layer ration and mix it in with the grower/finisher I have left, gradually switching over, or should I get another bag of grower/finisher and just put out oyster shell for the layer? Will that be enough calcium for her? And what about the roos? I really have no way to separate them... will the layer feed calcium hurt them? I have Agway and Tractor Supply near here, don't know where to find the Purina feed, guess I could look on line...I've been feeding Dumor unmedicated, they like it, and obviously they're doing well on it! So I'd just as soon stay with something I know works for them, but what would be best for the chirps??