Hi all, have a question. I have a flock of 5 chickens, 4 are 17 weeks old, the other is about 21 weeks old. My oldest hen started laying this week so today I am going to head out and buy layer feed. before this, all of the chickens were on Purina organic start and grow feed. I still have a 20 pound bag of the feed. my question is how to feed these girls now. My layer needs layer feed, my hens that aren't laying technically need start and grow still. Do I mix the two together? I have two PVC feeders in my coop, should I fill 1 with layer and the other with start and grow and they'll figure out which they should eat? just looking for suggestions. I think i might be able to get away with just switching to all layer feed but I don't want to waste the start and grow that I still have an unopened bag of, and ive had it for 3-4 weeks so the feed store wont take it back. Thanks in Advance!