My chicks are only about 5 weeks old. I have five, all of different breeds (in my signature) who were sexed at the hatchery as female. They chest butt one another occasionally, but there is no clear top dog, nor a clear underdog. They all seem pretty equal at this time (although there are differences in levels of friendliness and in personality). At about what age will a dominant bird emerge??? Or do some flocks not have a dominant hen? I'm just curious for future reference.