My chicks (6 silkies and 1 buff brahma bantam) are now almost 13 weeks old. This morning one of the silkies has started "bullying" two of the other ones. She/he is jumping on them biting their feathers and wings and basically scaring them to death. I know that silkies are really hard to sex, so my newbie question is this:Is this the beginning of rooster behavior although no crowing or wattles yet, or it is hens working out the hierarchy? They have been together since they were a day old with no fuss until this morning. My daughter is so upset, and we don't want them to get hurt. Also, why do you think she/he is only picking on two and leaving the others alone? Thanks for any advice!