You guys should grab those Orloffs - it's a nice breed. New birds should get a dose of Frontline, as well and being wormed - all of them should, if they haven't yet. See if you can borrow or buy a wire dog crate to put the new bird in for several days, and put the crate where the others can walk around it and see and hear the new bird, and she can see and hear the flock. after several days, let the new girl out for the day with the flock, but give her a couple more nights in the crate until they get their pecking order established. Then, after a full day out with the flock, you can let the new girl go to bed with the flock. After adopting this method, I've reduced a great deal of the fighting while they figure out where the new ones fit in. But, I also have the luxury of a big coop to put the cage in. It can be a pain to move the new bird and the cage every day, but this method really does help.
Diana, you can give the babies pretty much anything you eat - just chop it up real small, especially the collards, and feed it to them from your fingers. They may scoff at some things initially, but they eventually take it. My girls eat everything, and love when it's time to empty the fridge. I just grind everything up in the processor, ad add either liquid or dry ingredients until it is the consistency of oatmeal, and put it in a big dish. It's like a feeding frenzy. In the winter, they love a big batch of regular hot oatmeal.