this is week 3 for my chicks. never had chickens before. all has been virtually perfect until yesterday. suddenly (between 1p.m. & 4 p.m.) chicks had bloody rumps & verbal tones had changed. i pulled the hurt ones out & they spent the night in separate brooder. come morning, i put them back in with others (worried the 'flock' dynamic would change. they were instantly preyed on. i moved any one who picked on anyone into the smaller brooder. the others were quiet, content. the bullies were restless & anxious. i had decided it was time to move them to the coop (much expanded space). i moved the hurt ones first giving them the high ground that they were there first. then i brought in the trouble makers. it's been two hours - perfect harmony. oh, i forgot to say i painted the rumps of the hurt ones w/blue kote. there's room for eveyone's agenda. i still think i may have a problem w/ a wyandotte who seems to go out of her way to pick on anyone. the ones picked on were buff orpingtons the ones who did the picking were...all of the wyandottes, none of the buff orps, a couple of the black australorps, and one of the barred rocks. interestingly, one that didn't seem to engage in this brutal battle was a black australorp that i'm pretty sure is a rooster in the making. he seems to be a live & let live kind of guy. i thought i would keep a buff orp rooster, but he was one of the ones picked on. so i'm leaning toward the black aust. we'll see. since i was a little girl i have dreamed of having chickens (i'm 57 now). when i put them in the coop, it felt like everything fell in place. i know i will lose some, etc. but the moment has been sweet.