I planned on picking up a dozen or some mixed layer hatchlings, Bardrocks, Buff Orgs, Austrias, and Americaunas in a couple of weeks then putting them in the coop/run - brand new- around the first of June. I just got a call from a local woman who said she's moving and has 8 yearling layers - Bardrocks and Austria's - she's willing to give away. She said they are laying great right now. What is the best way to introduce the young and yearling hens to this new coop? Would it work out to put the youngsters there first or put them all in within a day of each other?