OK, I dont have any chicks...yet. I stopped at a feed store to check out their chicks; been thinking about getting some to raise up. So I'm looking at some 3 wk old black sex links, trying to decide if it would be worth the trouble right now (got a lot going on) and I ask, "So, at what age can I integrate them into the flock I already have? The youngest hen I have is about 6-7 months old." She looks at me like I've lost my mind & says, "Oh, I don't think you can, but let me check." She goes & asks an older woman sitting in a rocking chair, who basically repeats what she just told me. So let me get this right...if I have an established flock & want to buy chicks to take over egg-laying when the others get too old...I CAN'T PUT THEM TOGETHER? Wow, I can just imagine all the dozens of separate flocks I'll have if I listen to that nonsense, not to mention all the coops that will take over my yard! Do people selling chicks really believe this, or is it just my luck that I get the one misinformed chicken-seller that really believes that? BTW--Debi, just in case you hit this thread at the 'right' time, I've already checked out your BYC page & plan on using your tips!