2 flocks or combine

It doesn't really matter. It might be easier to have them together because then you only need to clean one coop, clean one waterer, and fill one feeder.

 

I think the slow integration plan is the best - much less hassle, time, and energy.

 

I would wait and do it later when they have the closer size and don't peep anymore. 21 weeks and even 6 weeks equals trouble for the little guys. When closer to size try it then. please not one at a time. They have a better time as a group than to be one against the 4 older ones... learned the hard way....

 

I'm lazy and only want to take care of one group of birds lol. I'd put them together when the littles are around four months old. That way you have the space you were keeping them in in case you need to isolate someone, or quarantine a new bird, get babies again, etc.