One of my male zebs has taking a beating from his room (cage) mates
And I want to take him out and put him in another cage with a couple of females to choose from.
Now my question is when should I do this because we have atleast 2 prs with hatchlings & 1 pr with eggs in the same cage !!!!?????
Yes, I'd do it ASAP. Most hen Zebra Finches will finish off young on their own if required & if he's being hounded he most likely isn't the main player in the breeding activity anyway. If he is being pushed hard, he will need to be removed for his own well-being anyway.