When to add chicks to established flock?

[PurplePoppiPpl]

My 5 bantam chicks are around 13 weeks old and have been inside the coop(in a enclosed brooder for a few weeks. I heard you can put them in around 2 months, but most of my chickens are standard sized and even the baby roo (silkie) who is the biggest is 1/3 the size of most of the big girls. i have one other silkie baby and the rest are tiny(almost half the size of the sikie roo. Not sure if i should still wait or what??

 

[DavidKerk]

For bantams, I would wait until they are about 16-20 weeks. After that, make sure they have a few hiding places where only they can fit. I hope this helps!