I have a hen that fell ill and had to separate her from the flock.  After several weeks of nursing her back to health, I am trying to place her back with her sisters and brothers.  She is very shy and my rooster is chasing her all the time.  When I come into the area, she clings to me like "oh mom, make that boy go away and left me alone."  I assume he's trying to let her know who's in charge.  Is it ever likily that he would kill her?  I just want to make sure I am not stressing her out too soon.  Appreciate anyones feedback.  As a side note, I recently discovered that both chicks I got from a straight run appears to both be males.  They are the same age, but one clearly showed his true colors several weeks ago.  The other is just now revealing himself.  I really didn't want two roosters, so is the concensus to keep the one that appears less aggressive?