Chicken breed politics

We’ve recently inherited seven chickens with a new house and the girls are lovely but are worried about the mix of breeds chosen and the smaller girls getting bullied/left out. We have four larger birds ( ISA brown, leghorn) and three smaller birds (silkies, aracuana). One of our silkies is looking a little less feathered but we’re still trying to figure out if she might be the bottom of the pecking order or it could also be molting. From research I can see it’s not the best to mix docile small breeds with more high energy large breeds. We’ve got the feed and water all in different sections and heights and make a big effort to make sure the three smaller ones get their share of treats.

Does anyone have any recommendations for things we can do to best manage this? Thank you!