Okay, one chick (and I know who) is picking on one other chick. The bully is (was?) my favorite, the biggest, a (probably male) bantam brahma. The chick singled out for abuse seems pretty random as it is not the smallest, rather it is right in the middle of the size range. I set up another makeshift brooder of the same size and put the abused one and his twin in it. The twin has sustained a little damage as well, mostly (I think) because the pair of them are easily mistaken for each other. Th picked on one seems pretty grateful to be on his own now, but the other was a bit upset so I added a couple other mellow chicks for company. I have ten total and I now have a box of four and a box of five and am monitoring both of them. I have a feeling that the violence was partly caused by cramp quarters. Yesterday morning I went out and it looked like they had doubled in size overnight and I was thinking that they were going to outgrow their box soon. So, finally to my question. How long should I wait before trying to reunite the group? Obviously I need to wait until the picked on chick is better (he wasn't severely injured or anything, just a raw spot on top of his head), but after that would it be safe to try with a bigger brooder? Also I hate to split up the chicks that get along. Right now I have two boxes of equal size, would I be better off to get them all a bigger space and isolate the bully? Or the picked on chick? The rest of my household is firmly in favor of tossing the bully in the coop with our (mostly) full grown rooster, or at least chucking him in solitary, but I think that's a bit harsh since he's only a two weeks old.