I have a White Leghorn that I think is about 4 weeks (I'm not sure exactly the age) and who has started to behave agressively towards the other hens. This particular chick has always been a little bolder than the others but last night the drama that unfolded startled me. This chick is named Master Chief (after the Halo 3 hero), and it suddenly started attacking one of my most docile and lovable chicks (Sunshine). When I intervened he went after another chick with chest held high and neck feathers raised and pecked and chest bumped the chick who thankfully fought back a little. I ended up separating Master Chief for the night and since I reintroduced him/her to the crowd things have been back to the normal level of bossiness. I also have two Barred Rocks who are a litlle younger and one seems to be developing a little faster than the other. Perhaps I have two Roo's? They all came from the TSC bin marked 'Assorted Pullets'. What do you all think? THis is Master Chief, the aggressive White Leghorn This is Sunshine, the most docile and friendly White Leghorn but also the most picked on. This is Cartman, the Barred Rock potential Roo. The tail is a little taller and the Comb a little taller than the other BR Chick This is PeeWee, my other BR who doesn't have much of a comb showing at all. I think the BR's are about 3 weeks old.