Introducing new hens should be no problem, in fact the other hens will probably be relieved at someone else getting some of the rooster's "attention", lol.
Maybe the hen you have that is laying the colored eggs is actually an Aracauna cross? Some crosses will still retain some of the "ear" feathering....does she have a pea comb? (Sorry, I think I mistakenly called it a rose comb earlier) The pea comb doesn't tend to stay nearly as small in crosses. I just wonder, because every Aracauna I have had produced very nice, large eggs.
And no problem....it's fun to find someone with an interest in chickens beyond the fried kind.
