I'm looking for info or ideas from those who may have done this. I currently have 4 year old birds. I want to start a 2 stage process where I cycle between 4 and 8 birds by bringing in 4 new chicks every other spring. The thought is to integrate them once they're big enough and then cycle out the 4 older birds when they're done laying, replacing them with 4 new chicks later on. I'm planning to add an addition to my current coop to support this. I have a good sized window on one side that I want to be the connector to the new coop. I plan to use this window to keep the two flocks separated when the new birds are still young and then open the window to have one big common coop once the new birds are grown. Does anyone else have a process like this with your backyard flock?