I have 2 Buff Orpingtons (one cockerel one pullet), the rest are pullets, 2 Golden Sex Links, 1 Leghorn, 2 Cuckoo Cochins, and then 4 EE. My EE are only 4mos 3wks, and my others are 6mos. I had a hard time integrating them before doing a look but don't touch approach (I built a mini coop they stayed in for a few weeks). Now though, things are fine overall. My EE are FAST, and know how to move. I would still say they're "bottom of the pecking order" because they were introduced later, but they don't get picked on much at all. My cockerel has actually taken to protecting them now that they've been out there for a while. My EE are still smaller than the others, but they are learning to hold their own or get out of the way (during treat time, it's kind of funny, 1 EE will run up and nab a treat then take off to where I'm at and gobble it down, even though I'm offering so I make sure they get some). So for me, it's working with the things I've done. I also have an extra feeder and waterer in the run (someone suggested it, and it's helped), and a place where my EE can go to just "take a break" if they need to. The only ones of the bigs group I had some issues with (mostly some feather pulling and some pecks) were my 2 cochins who are bottom of the pecking order in the grouping, but that's because they were trying to keep their spot, they've chilled down now.