I'm new to or I should say new again to chicken keeping (it's been 30years). I grew up around them but picked up 6 new chicks last week. Today I had the opportunity to rescue two Transylvanian Naked Necks that needed re-homing (We'll be getting them this weekend). They just started laying so are under 1 year from what I've learned so far. My chicks (3 Barred Rock and 3 Americana) are only 1 1/2 weeks old. I had planned on putting the chicks outside at 8-9 weeks but should I wait longer when integrating them with the two older birds? I know about picking order issues when combining flocks but haven't read anything about what age is best to combine them. Is there a better age to combine chicks to the flock or does it matter?