I have 8 chicks all born May 1. 5 white leghorns, 1 Easter egger, 1 polish, 1 silver spangled Hamburg. We have had the silver and polish separated for about 3 weeks because they were being bullied. The polish's head was about plucked bald when we noticed it (happened within an hour of us checking on them). Now we are trying to incorporate the silver and polish in with the others. We have had them in a separate fence off area on the coop so the others can smell and see them. As soon as we mix them in the others All attack them. Any advice? Also three of the leghorns are looking like roosters but not sure. This is my first time raising chickens. Thanks.