My Buff Orpington has been displaying uncharacteristic behavoir; that could be due to the introduction of two new birds (a RIR roo and a silky-both from a seemingly carefull breeder.). What I'm more concerned with is that her rear end is covered in poo. It has worsend over the past week. I have also noticed a overall lightening of the color of all of their egg shells and a complete turn around in her behavior- going from very dominant to very passive.They are dealing with a lot of changes, the weather, new birds etc. I suspect the change to their diet may be a leading cause, but I am begining to wonder if something is wrong with her and possibly the others as well. Any thoughts/ suggestions?