Putting different age chicks together

[cmom]

I just combined some of my birds, My 8 month olds. I not only combined them but I moved them to one of the other coops that had more nest boxes so they were all in a new place. There were minor squabbles the first night. Tonight they went in to roost peacefully.

 

[bensig85]

Hi I'm new on here and also new to raising chicks. I have 10 that are a little over 3 weeks old and 3 that are almost a week. When should it be ok to put them together?