x2.
I'm lucky, I have a lot of room for the broody and chicks to avoid conflict and my broody is not at the bottom of the pecking order (although she was until she hatched her first brood, then she became the terror of the hen yard

). Sometimes you don't have an option, if you have a crowded run and don't have the ability to let them roam together with escape routes, then it separation is probably the only option.
Right now I'm integrating four six-week olds that I hatched in the incubator into my brahma pen. It is hard to do, so I prefer letting the broody do it (if only she'd go broody again, I've got a bunch in the bator now). I let them in the same area with the flock as often as I can (heavily observed) and notice that there is one hen that just wants to chase them. I don't know if it is jealousy or what, but she's terrorizing the poor things. They have their own run so they can get face to face and when I can I open the gate and let them roam with the big guys. With that said, they are able to get away from her when they need to and seem to be doing okay with the rest.
I'm about to undergo a huge change up of my pens, so I'd love to have some advice on how to accomplish that. I've built a new coop, so everyone is going to be in a new home.....I'm hoping that will make the chaos a little less chaotic, but I'm expecting to have a few tussles before it is all over. I'm planning on removing the roosters from the pens, they will both go into cages for the transition (I really, really don't need their help). Then, I want to put all of the hens together in one large condo and run. I'm going to get rid of my barnyard rooster and keep my brahma rooster, but I don't want him to breed except with the hens that I want him to breed to. So, they are going to have their own condo and run for that purpose. I'll also have a chick pen where the 5 week olds and up can go until I figure out their sex. The pullets will go in with the rest of the hens and the cockerels will go into their own coop and run until we are ready to choose them from breeding or eat them. I know that this sounds complicated, but it really isn't. My biggest concern is the initial move.....the laying hens have never been with the brahma hens although they are able to see each other from their two coops/runs right now. I usually free range them separately, mostly because of the roosters (who still manage to get into it, no matter how careful I am to keep them apart)