I thought I would let everyone know that I had 4 top hat variety chickens in a brooder. They were all hitting about 5 1/2 weeks and I wanted to put the older looking ones out. So, I scooped up the houdan and the Gold Laced Polish and put them in the coop with some 6 week olds. some 7 week olds, and 4, 12 week olds. They all share a brooder. Everything was fine. I found the houdan alone outside the run, but everyone else was free ranging around. I locked everyone up at night and the houdan was asleep with the smaller chicks. Sun. morning I wake up and found the poor chick pecked to death. I think once they saw blood they don't stop. I find it strange the Golden Laced polish which is the same age did fine with its peers but the poor houdan didn't make it. I now know when putting new birds in, not to be so brash and blase about it. I am waiting until the 2 other top hats get older. It is a silkie and a Sultan. I guess we all gotta be really careful putting together birds that weren't raised together.