I will talk to my GF that is brooding them and see how she would feel about adding the Dom. Last time I mentioned it she was wanting to quarentine for a week. Make sure none get sick. Maybe I will get the Dom with her new flock this week.Cats ALWAYS pick their people, NEVER the other way around.
I put my orphan LF chick in with the silkie chicks when his momma was killed by a hawk, they were the same age, but he was twice their size. He didn't pick on them, in fact he ended up in the middle of the chick order under 2 silkies. You could do it like people do with adult birds. Turn off the lights for a while, put the new chicks in and then turn the lights back on. Just don't let the lights off too long as to cause them to get cold(I would say 30 min of no light would be long enough)