Feathers flying is normal, but it can get out of hand. What are the numbers of each group of birds? Sometimes it is best to divide up the dominant group.
Say you have 6 older birds and 2 chicks, take one or two of the middle of the pecking order birds, and put them with the chicks for a few days, there will be a dust up, but generally that will settle, then try and put them together. Often times there will be one or two of the older birds, that are just mean, grab them and put them where you have been keeping the chicks until the chicks and remaining older birds get things settled, later you can add the older birds back in, but it might be two weeks later.
A lot also depends on your set up. Pictures would help. Adding a lot of hideouts, platforms, roosts in the run can help with multiple hidden feed bowls.
Mrs K