Yesterday we bought a two week old chick (EE or Wellsummer, not yet sure). Today we just brought home two 1 day old chicks. They were getting along fine. When we checked on them this evening, one of the younger chicks (EE) was pecking at the eyes of the two week old! It's all red around her eyes! Oddly enough, this chick is very similar in coloring (and may be the same breed) as the one it went after!! It hasn't bothered (yet at least) the smaller newbie (barred rock) who is a completely different color. I've removed the injured two week old to a separate habitat. I hate to do this because she was so lonely last night before we got the new ones, but I fear for her safety. Why would a new chick attack an older, slightly larger chick? Why would the larger chick put up with it?