Good and bad news regarding my integration attempts. I took the brooder chicks to the partitioned area in the run again today, broody really wanted in so I let her (and her chicks) in with mine. My kids were with me and my younger one had thoughtfully put a handful of scratch on the ground for them to find. Broody called everybody to the candy and offered it to all the chicks, and was adorable surrounded by all 8 fuzzy butts!!! They hung out together for a while and I think I'm confident enough to trust her not to kill my babies. I think she quite likes them. However, we have a new problem. Her two boys HATE my chicks!!! They are all 4 weeks old now and I guess the boys are getting a little bossy. They've been challenging each other by flaring their hackles and jumping at each other, and so have my boys, but it's all pretend. When broody's boys got close to my chicks though (regardless of sex) they'd do all that AND peck them mercilessly, and I mean not just peck but grab and pull and not let go until they pluck the fluff off! None of them do that in any other context. The little butts are acting hostile and are speeding up their eviction with that crap. I mean, it makes sense, they don't want to share their mom, but still. My chicks had never been pecked or harassed and didn't know how to respond. They didn't fight back, but didn't run away either, they just stood there, stunned and confused, while they were being plucked... Ugh.
This is seriously messing up my integration plan. I'll need to do something, soon. The end goal is to give the broody's 3 chicks, plus all of my boys, to my friend who'll raise them for me on her farm until they're fit to eat. I was hoping to do it all at once - move them all together so it's less hassle for her, and less stressful to them, as they'll all be on neutral territory and may not fight as much. I'd do it now but I'm still not 100% sure on all of my chicks yet... I'll post the 4 week pictures and see what guesses I get. At this point I'm positive about 2 boys and 1 girl, almost sure on a second girl, and not at all sure on the fifth one. It's my favorite, so I want to give it a chance...
I need to act fast, for 2 main reasons: 1) the chicks in the brooder are getting really destructive and ripping up the cardboard, so they need to go outside soon, but I don't want them getting beat up all day by those brats. And 2) I don't want any chance of crowing, because of my a-hole neighbors and the hell they put me through last summer, and somebody I know just posted a video of her 4.5-week-old cheeping chick crowing already... So the broody's boys are a ticking time bomb and they need to go soon.
I was REALLY hoping the broody would adopt my chicks and help them integrate, and I think she's willing, but every time her chicks harass mine, she breaks up the fight by taking her sons' side and pecking my victim chick. Not too hard and I'm not concerned about them getting hurt, it's just socially confusing and stressful to them to be getting mixed signals by her. One chick got the crap pecked out of him by her son, and then got pecked by her as well as a response, and at the end he was so stunned and shocked, poor thing, he just stood there frozen, looking at me...
(they still run to me for comfort so I was hoping they'd have a mother figure in her to replace me when they go out, but not if she's pecking them).
So I think my options are to either integrate without relying on her (by keeping my chicks behind the divider longer), or get rid of her chicks and hope she doesn't take it out on mine in the PTSD of losing her babies. Or, actually, a third option - I get rid of the broody's 2 boys and my 2 boys now, and integrate my remaining potentially female chicks with the flock with more time for mingling. That way the broody still gets to have one of her own chicks (which I think is female, and which isn't acting hostile towards mine at all), and the overall stress and fighting is reduced when the boys are out of the equation. So if she doesn't have to referee, she might accept my chicks more easily. And if my unclear chick ends up male, I'll just have to cull it (if rehoming doesn't work out).
I'm sorry this got so long. This is too much chicken drama and I'm trying to figure out what to do. Advice would be appreciated!
so they don't get perched on like this. I love the chick stage because they are all light and agile enough to climb me. When full grown, Orps are too big, heavy and lazy to bother with anything higher than my lap. The Barnevelders, though, being half their size and weight, still like to perch on my shoulder/back even now that they are full grown 
May need to get their run partition up sooner than I thought...
And my broody in particular. I put up the divider in the run and let the brooder chicks out on one side to explore more freely. The hens came to check them out, but lost interest quickly and went back to their business. The broody, on the other hand, was VERY interested. She kept pacing back and forth trying to find a way in, clucking motheringly at them and trying to feed them bits of greenery. They were very interested in her, too. It was all going so well that I got brave and decided to open the divider a little bit... about a foot. Two of my chicks ran over to the broody and had their heads together with hers pecking stuff off the ground that she was showing them!!! They hung out together for a while, then my chicks came back to my lap. They did that a second time, when she called from much farther away - maybe about 10 feet from me - two chicks practically flew at her, wings flapping, to see what she'd found on the ground. They fluttered playfully for a bit and then came back to me again. None of the other hens did anything. No chasing or pecking or angry sounds whatsoever! 
Hiiiii!
Babies wanted out!
Hoping for some hens!
