Things have been going well... I cut the little doors for the chicks to go in and out, bought feed for everybody and replaced the layer feed; everything has seemed fine, now today I found one of my chicks dead under the coop with one puncture wound at the base of the neck/front of the breast. I'm really bummed.
I've seen various of the older birds chase the little ones a bit, but nothing serious. The chicks are 7 weeks old and too big to be crammed into the brooder area all the time. I think the dead one may have gotten herself trapped, she was in a corner next to one of the supports for the coop, but that one wound is the only mark on her. Ugh... stupid chickens. I don't know of anything I can do differently, so I guess I'll just have to try to watch and try to see if one of the older birds is being nasty....