Reintegration after an injury

[Jae]

Could I get some advice on reintegrating chicks?
I have a whole 28 pack of mixed chicks that are 8 to 6 weeks old. My husband got another 4 silkies, they are 4 or 5 weeks right now. 2 weeks ago one of the silkies came to me and nuzzled, something only my chicks who have gotten sick have done. I picked her up and she had somehow gotten a cut on her leg. She acted like a total baby lol.
I was leaving in vacation in a few minutes so we all made her a hole out of a massive pig trough. I cleaned her up and pampered her. Put the other 3 in the trough with her and gave my house sitter directions.
I knew I needed to get her back into the room asap but I was scared not being there.
So, as soon as I got home I made this area for them to all acclimate to the silkies.
It's been a few days, I put them all together last night and they got picked in pretty badly. I turned the light off and the 4 stayed out of the way under another light but it stayed clam.
So I left.
This morning they were all ok. Still a bit more picking than I'd like but sorta calm.
Later this morning it was like shark feeding season and they were just getting nailed. They were terrified and racing and wouldn't calm. They finally all came to me for securement. I put this back into the room. They called down as soon as they went in again.

What can I do?! Anything? My husband had to have them and man I don't want to rehome these babies but their happiness is priority here. Any advice greatly welcome.

 

[aart]

Space is awfully small...more space is always better.
Here's some integration tips that might help.

Integration Basics:
It's all about territory and resources(space/food/water).
Existing birds will almost always attack new ones to defend their resources.
Understanding chicken behaviors is essential to integrating new birds into your flock.

Confine new birds within sight but physically segregated from older/existing birds for several weeks, so they can see and get used to each other but not physically interact.

In adjacent runs, spread scratch grains along the dividing mesh, best if mesh is just big enough for birds to stick their head thru, so they get used to eating together.

The more space, the better. Birds will peck to establish dominance, the pecked bird needs space to get away. As long as there's no copious blood drawn and/or new bird is not trapped/pinned down and beaten unmercilessly, let them work it out. Every time you interfere or remove new birds, they'll have to start the pecking order thing all over again.

Multiple feed/water stations. Dominance issues are most often carried out over sustenance, more stations lessens the frequency of that issue.

Places for the new birds to hide 'out of line of sight'(but not a dead end trap) and/or up and away from any bully birds. Roosts, pallets or boards leaned up against walls or up on concrete blocks, old chairs tables, branches, logs, stumps out in the run can really help. Lots of diversion and places to 'hide' instead of bare wide open run.