Old chicks young chick when will they hang out together

[Craftycindy]

Okay my old flock are two years old my new flock are 6 months old they do not hang out together they do sleep in trees together I think but never in the same area together is that strange or will they always stay separated. I would like to see them together so I can keep a count on them as they are completely free roaming chicks and I got to look for 2 flocks all the time it would be easier to look for one they coop in one area for food and water. Thanks

 

[SIMZ]

Mine usually start hanging out together around the 18 week mark. I put them in around 12 weeks and pretty much stay in very separate groups up until then. They go into the same coop at night and only free range in a large fenced in area, though. I wonder if yours have so much freedom and space that they may not fully become one flock? I hope someone with a similar situation gives you some ideas!