How old do my EE's have to be before I can mix-up with Roosters???

[pooponshoe]

They are approx 6 weeks old. My 2 Aussie Orps roos are about 18 weeks old. They free range in 3 tractors but the roosters were pretty rough with the gals (the rocks) so they are "on their own" with 2 pullets of their breed, they are pretty fast (the Aussie gals) and they give them a run for their money.
Got too much going on at once it looks like.

 

[Wildsky]

Wait untill the babies are about the same size as the adults before you mix em up together.